the idea of arranging the elements in the periodic table

Answers

Answer 1

Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.


Related Questions

What is the formula for this compound?
2 atoms of aluminum, 3 atoms of sulfur

Answers

Answer:

A

Explanation:

2 atoms of aluminum, 3 atoms of sulfur

Aluminum = Al

Sulfer = S

i just took the test

The formula for 2 atoms of Al and 3 atoms of S is Al₂S₃  and is named  Aluminium Sulphide.

How are the formulas of the compound formed?

Al has atomic no. =13, S has atomic no.=16

So the valencies of the given elements are

Al⁺³ and S⁻² to attain the noble gas configuration.

Al⁺³↘ ↙S⁻³

                  Al₂S₃

Cross multiply the valancies for the formation of molecular formula.

Hence, the formula is Al₂S₃.

Learn more about chemical formulas.

https://brainly.com/question/11995171  

#SPJ2

how many moles of water in 100 grams

Answers

Answer:

There are approximately 5.55 moles

Explanation:

What part of the periodic table does the neutrons tell us about the element?

Answers

Answer:

The neutrons tell us if it is an isotope or not, they also hold the atom together.

Explanation:

Is this statement true or false?


A compound is a substance made of two or more elements joined in a chemical reaction.



true


false

Answers

The correct answer is False.

This is false I hope this helps goodbye

please help quickly

Rubia was given a type of inclined plane called a ramp in her science class. Her teacher told her that the ramp should have a mechanical advantage of 3.



Rubia pulled a block up the ramp, but afterward she calculated that the mechanical advantage of the ramp was 2.8 instead of 3. Her teacher said she did not make a mistake. What did Rubia calculate?
A.
the actual operating power of the ramp
B.
the actual mechanical advantage of the ramp
C.
the ideal mechanical advantage of the ramp
D.
the ideal operating power of the ramp

Answers

Answer: B. The actual mechanical advantage of the ramp.

Explanation:

The professor saying that the ramp SHOULD have a mechanical advantage of 3 indicates that that would be the ideal mechanical advantage. Since Rubia calculated it to be 2.8, that means that it is the acutal mechanical advantage. The actual advantage will be reduced from the ieal due to things like friction.

What are ocean currents?

Answers

Answer:

What are ocean currents?Ocean currents are continuous movements of water in the ocean that follow set paths, kind of like rivers in the ocean.

A student pours ammonium nitrate into a container of room temperature water. The student stirs the mixture with a stirring rod and then feels the outside of the container, which is cold to the touch. Which material is part of the system that absorbed heat?

the water

the air

the stirring rod

the container

Answers

The material that absorbs the heat of the system is water owing to its high specific heat capacity.

The specific heat capacity of a substance refers to the amount of heat that is capable of increasing the temperature of 1 Kg of a body by 1 K. The higher the specific heat capacity, the more the amount of heat that the body can absorb without temperature change.

The material that absorbs the heat of the system is water because water has a higher specific heat capacity than all the other materials present.

Learn more about specific heat capacity: https://brainly.com/question/2530523

The material which is part of the system that absorbed heat is; The water.

Discussion:

According to the question;

Water was initially at room temperature.We know by convention, ammonium nitrate is a cold substance.

In essence, the heat liberated from the system must have been absorbed by the water so that the outside of the container after mixing becomes cold.

This is so because water has a high specific heat capacity.

Read more on heat capacity:

https://brainly.com/question/16559442

1. How many covalent bonds can nitrogen form?

2. Which of the following represents a covalent compound?
A. O2
B. CO2
C. Cl2
D. NaCl

3. 2. Nitrogen is a diatomic element with five valence electrons. Create a model of a molecule of nitrogen.

Answers

Answer:

1. 3 covalent bonds

2. CO2

Nitrogen can form three covalent bonds and carbon dioxide  represents a covalent compound.Molecule of nitrogen is attached in image below.

What is a covalent bond?

Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.

Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.

Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.

Learn more about covalent bond,here:

https://brainly.com/question/19382448

#SPJ6

A chemist heats a gas within a sealed, rigid container. Which statement describes the changes that occur in the gas? (1 point)
-The gas particles move slower and hit the sides of the container with less force, consequently, the pressure
increases
-The gas particles move slower and hit the sides of the container with less force, consequently, the pressure decreases
-The gas particles move faster and hit the sides of the container with more force, consequently, the pressure
increases
-The gas particles move faster and hit the sides of the container with more force, consequently, the pressure
decreases

Answers

When a gas is heated in a sealed container, the gas particles move faster and hit the sides of the container with more force leading to an increase in the pressure of the gas.

An increase in the temperature of a gas increases the collision rate of the molecules of the gas according to the kinetic theory.

With increased kinetic energy, the molecules of the gases collide more frequently with each other and the walls of the container.

The collision creates an increase in the magnitude of pressure inside the container.

More on the kinetic theory of gases can be found here: https://brainly.com/question/15354399?referrer=searchResults

Answer:

C

Explanation:

When a gas is heated in a sealed container, the gas particles move faster and hit the sides of the container with more force leading to an increase in the pressure of the gas.

How many protons, neutrons, and electrons are in an atom of beryllium with a mass number of 9?

A) 5 protons,5 electrons,4 neutrons
B) 4 protons,4 electrons,4 neutrons
C) 4 protons,4 electrons,9 neutrons
D) 4 protons,4 electrons,5 neutrons

Answers

Answer:

c / a

correct me if im wrong

Answer:

D) 4 protons, 4 electrons, 5 neutrons

what is combined to get calcium chloride​

Answers

Calcium chloride can be created by neutralising hydrochloric acid with calcium hydroxide.

Answer:

See below

Explanation:

This is a simple reaction.

Calcium and chlorine molecule are combined to get calcium chloride.

Ca + Cl₂ → CaCl₂

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

~AH1807

Why can't percent yield be greater than one hundred percent?

Answers

Answer:

Percent yield is the maximum amount of product that can be formed in a reaction. Matter cannot be created or destroyed according to the law of conservation of mass, so you cant have over 100%.

Explanation:

In Natural selection, who/what makes the decision about which traits are desirable and get passed to future generations?

please need help asap thank you.

Answers

Answer:

Different alleles and genes determine what gets passed down.

Explanation:

Its a pretty weird/ open ended question, but the alleles that help an organism survive, will be passed down more often because they are more "fit" and can out survive its competitors within a certain species.

why does fluorine have the highest electronegativity

Answers

Answer:

- Fluorine has 5 Electrons in its 2P shell

- Fluorine is so close to ideal Electron Configuration, the Electrons are held very tightly to the Nucleus.

Explanation:

Hopefully this was helpful!

When 25.0 g of NaCl is added to 175 g of water, the mass percent (m/m) NaCl is ________. 7.00% 8.00% 12.5% 25.6% 14.3%

Answers

Answer:

12.5%

Explanation:

percent blurf = quantity of blurftotal quantity×100quantity of blurftotal quantity×100

So for percent by mass, both quantities are expressed as mass, and it’s the mass of NaCl divided by the total mass of the solution, then times 100%

mass % NaCl = 25 g/175g×100

mass %NaCl = 14.3%

Explain what happens during soil depletion and also how we can help prevent this naturally without chemicals?
PLZ FAST TYY <3

Answers

Answer:  create more healthy products for the soil and animals

Explanation:

What is the one defining abiotic factor of a desert?

cold temperatures

high winds

little or no rainfall

high humidity

Answers

Hello! :p .

deserts are known to have little to no rain fall & drop to very low temperatures at night! I hope this helps!

Answer: little or no rainfall

Explanation: Precipitation, sunlight, and temperature are all abiotic factors.

Deserts have a lack of rainfall.

Some deserts are hot, some deserts can be cold too.

Abiotic factors are  extreme temperatures of the day and night  the fast winds  the strong amount of sunlight  scarcity of water

how many molecules are in 122 grams of Cu(NO3)2

Answers

Answer:

3.917 x 10 ^ 23

Explanation:

You just want to use dimensional analysis to solve. So first start with 122g of copper(II) nitrite, and divide by the molecular weight to get it into moles. Then you know that 1 mole = 6.022 x 10 ^23 molecules (Avogadro's Number) so multiply that by your current moles. A hint for these problems always convert what you were given to moles since it is easy to get to a lot of things through them. ** Use the molar mass/molecular weight for going from grams to moles or moles to grams and use Avogadro's number when going from moles to atoms/molecules or reverse.

Hope this helps!

A chemist wants to extract the gold from 54.9 g of AuCl3*2H20 *gold(III) chloride dyhydrate) by electrolysis of an aqueous solution. What mass of gold could be obtained from this sample? Answer in units of g

Answers

From the information provided in the question, the mass of gold that can be obtained from this sample is 31.5 g of Au.

Given that the reduction of gold III occurs thus;

Au^3+(aq) + 3e ------> Au(s)

Number of moles of gold(III) chloride dihydrate = mass/molar mass = 54.9 g /339.35 g/mol = 0.16 moles

Number of moles of Au^3+ in  AuCl3.2H20 =  0.16 moles

Now;

1 mole of Au has a mass of 197 g/mol

0.16 moles of Au has a mass of 0.16 moles ×  197 g/mol/1 mole

= 31.5 g of Au.

The mass of gold that can be obtained from this sample is 31.5 g of Au.

Learn more: https://brainly.com/question/6284546

an atom of which of the following elements can form the most bonds?
a. phosphorus
b. sodium
c. oxygen
d.oxygen

Answers

Answer:
A.phosphorus
:)

A scientist was in the field when he saw a mineral sample. He wanted to determine the relative hardness of the mineral, so he conducted scratch tests. He summarized his results in a table. A 2 column table with 4 rows. The first column is labeled Mineral with known hardness with entries: Chalcopyrite, pyrite, Orthoclase, Quartz. Second column is labeled Was a scratch produced? with entries: Yes, Yes, Yes, No. What conclusion can you make about the hardness of the mineral?.

Answers

The mineral hardness depends on its resistance to being scratched. Mohs scale is used to determine the hardness of an unknown mineral. The unknown mineral is harder than Orthoclase, but not harder than Quartz.

-------------------------

The hardness of a mineral is its resistance to being scratched or marked on the surface by another material.

Several elements are used to test the hardness of a mineral, like another mineral of known hardness.

Many different scales can be used to identify the mineral. However, the most commonly used is the Mohs scale.

Let us say that you have two minerals. You already know which mineral is one of them and its hardness.

If the unknown mineral scratches the known mineral, means that the first one is harder than the second one.

But if the unknown mineral does not get to scratch the known one, it means they are equally hard, or the known mineral is harder than the unknown one.

In the exposed example, the table must be as follows

    Mineral                     Was a scratch produced?              

Chalcopyrite                               YES

pyrite                                           YES

Orthoclase                                  YES                                          

Quartz                                          NO                                            

Quartz is the hardest of these minerals. Its hardness level is 7 according to the Mohs scale.

Because scratches were produced using Chalcopyrite, Pyrite, and Orthoclase, we can assume that the unknown mineral is harder than these three ones.

However, no scratch was produced using quartz, suggesting that the unknown mineral is between orthoclase and quartz in the Mohs scale.

The unknown mineral is harder than Orthoclase, but not harder than Quartz. It is between 6 and 7 hardness levels.

---------------------------

You can learn more about the Mohs scale at

https://brainly.com/question/198363

https://brainly.com/question/1585664

https://brainly.com/question/10202262

Answer:

I can conclude that the mineral that the scientist found is harder than chalcopyrite, pyrite, and orthoclase, but not harder than quartz. I can also conclude that the unknown mineral is a relatively hard mineral.

Explanation:

edge example 2023

After moving down a group in the periodic table, the number of valence electrons

Answers

the number of Valence electrons remains the same

Why does liquid move like it does when heated on the right side?

Answers

Answer:Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight they expand more than solids.

Explanation:Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.

For an electric toothbrush, is input energy equal to useful output energy? Explain
your answer.

Answers

No, input energy is not equal to useful output energy, if it is an electric toothbrush.

What is the useful type of energy produced in an electric toothbrush?

Electrical Energy is the useful type of energy produced in an electric toothbrush.

If input energy is equal to useful output energy. This means that the total amount of energy that is in an isolated system (such as an engine or a generator) remains constant (conserved) over time.

However, the total amount of useful energy output of an isolated system is never equal to the total energy input.

Learn more about the electric toothbrush here:

https://brainly.com/question/8318282

#SPJ1

How did the Heisenberg uncertainty principle contribute to the idea that electrons occupy “clouds,” or “orbitals”?​

Answers

How did the Heisenberg uncertainty principle contribute to the idea that electrons occupy "clouds" or "orbitals"? Because the exact position of the electron is not known,it must be assumed that the electron takes up the entire space in an orbital.

What is the frequency of the above wave?

Answers

Answer: is a measurement of how often a recurring event such as a wave occurs in a measured amount of time

Explanation:

3) The nucleus in a photograph of a cell measures 3 mm across. If the magnification in the photograph is x 500, what is the actual size of the nucleus?​

Answers

Answer:

1500mm oqkwndbdjdhdndjdd

what happens when you add vinegar to baking soda

Answers

Answer:

When baking soda is mixed with vinegar, something new is formed. The mixture quickly foams up with carbon dioxide gas. If enough vinegar is used, all of the baking soda can be made to react and disappear into the vinegar solution.

Explanation:

How does VSEPR theory describe the double bonds between the central carbon atom and each oxygen atom of Co2?

Answers

The double bonds in CO2 are counted as single regions of electron density.

The valence shell electron pair repulsion theory VSEPR  is a description of the shape of molecules based on the number of electron pairs that surround the central atom in the molecule. Double bonds are counted as a single region of electron density.

Hence, the two double bonds in CO2 are counted as two regions of electron density around the central carbon atom. Hence, the molecule is liner at a bond angle of 180 degrees.

Learn more about VSEPR theory: https://brainly.com/question/14225705

Na2SO3" represents sodium sulfite. What does the 4 mean in the formula 4Na2SO3? There are four atoms of sodium. There are four atoms of sodium sulfite. There are four molecules of sodium sulfite. There are four elements in sodium sulfite. 7
The World on Turtle's Back" is a creation myth because it focuses on characters whom the Iroquois considered "gods. " is an Iroquoian story about people and animals who talk to each other. Explains how the Iroquois believe that the earth was created. Describes Iroquoian social and cultural values.

Answers

The designation "4" before Na2SO3 simply means that there are four molecules of sodium sulfite.

A molecule is formed when two or more atoms of the same or different elements come together. The formula of the molecule must reflect the number of atoms from which it is formed. The designation "4" before Na2SO3 simply means that there are four molecules of sodium sulfite.

The "The World on Turtle's Back" is a legend creation story. According to this story, the world was created on a giant turtle back. The folktale is common among the  Iroquois Native Americans.

Learn more: https://brainly.com/question/19922822

Other Questions
write a program to print. * ************** Henry Clay was a strong supporter ofSelect the best answer from the choices provided.O A. political bickering.the Hartford ConventionO C. protective tariffsO D. John Marshall's court What is the angle, in degrees, when the coordinate is [tex](-\sqrt{2} /2), \sqrt{2} /2)[/tex] ? Pls help thanks I was absentee and i dont know how to solve it help plz PLEASE HELP ME!!!Which expression has a value of 8?a: 10(2)b: (10)(2)c:(2)(10)d: (2)10 Frank rented a truck for one day. There was a base fee of $18.99, and there was an additional charge of 76 cents for cach mile driven. Frank hadS152.75 when he returned the truck. For how many miles did he drive the truck? Which two changes of state can occur when a substance gains thermal energy A sublimation b depositation c condensation and d vaporization before achilles reenters the battle, he is warned that he is fated to die shortly after he kills hector. who warns him? Tamika ran 90 meters in 16.1 seconds. Enrique ran 90 meters in 17.0 seconds. Who had the fastest time, Tamika or Enrique? A. Enrique B. Tamika A grocery store buys cereal using the cost function c(n) = { 2n when n < 100 1. 9n when 100 n 500 1. 8n when n > 500 where n is the number of boxes of cereal the grocery store buys and c(n) is the cost of the cereal. The grocery store then sells the cereal using the sales function s(c) = 1. 3c. What is the grocery store's sales from selling cereal if the grocery store buys 100 boxes and sells all of them?. A computer artist created a rectangular image measuring 50 millimeters by 120 millimeters. She then dilated the image by a scale factor of 2.5. What are the dimensions of the dilated image?A 125 millimeters by 120 millimetersB 52.5 millimeters by 122.5 millimetersC 125 millimeters by 300 millimetersD 20 millimeters by 48 millimeters . How do you think Apple has handled the various ethical issues that it has faced in the past Help plz: 8. Multiply the following:a. (x^3)(x^2) =b. (x^7)(x^10) =c. (3s^4)(-6s^5) =d. (-20x)(3x) = does anyone have this book? Who is the only person to make the final (decide) ______________in your family? Audra owns a rental house. She makes mortgage payments of $1,060 per month, which include insurance, and pays $2,700 per year in property taxes and maintenance. Utilities are paid by the renter. What should Audra charge for monthly rent to make $4,500 profit each year? Three cards are dealt from a shuffled standard deck of playing cards. Find the probability that the first card dealt is red, the second is black, and the third is red. (Enter your probability as a fraction.) PLEASE I NEED HELP ASAP PLEASE PLEASE!!!For a list of numbers entered by the user and terminated by 0, find the sum of the positive numbers and the sum of the negative numbers. C++ language only. At the craft store, Franklin bought a bag of red and brown marbles. He received 33 red marbles and 67 brown marbles. What percentage of the marbles were red? The author of document C chooses to mention the increasing number of bullet rounds used in order to convey. Question 4 options: his disgust for war that this is an unordinarily large number his hatred of the British a sense of patriotism.