Answer the question below. Use the rubric in the materials for help if needed.

Compare and contrast ionic and covalent bonds by explaining what the electrons do when bonding occurs. Use details to support your answer.

Answer:

english please I don't understand

Answer:

ENGINE COOLANT

Explanation:

Another example of thermal expansion on the part of a liquid can be found inside the car's radiator

Answer:

covalent....................

Answer:

mercury and gallium are two metals that are found in liquid state at NTP.

Answer:

milk, lemon juice, toothpaste and baking soda

Since we are starting from the number of atoms of Sulfur, we need to know two sets of formulas:

mass  = moles × molar mass

moles = atoms ÷ Avogadro's Number

         ⇒    mass = (atoms ÷ Avogadro's Number) ×  molar mass

 mass = [(100 atoms) ÷ (6.022 × 10²³ atoms/mole)] × (12.011 g/mol)    

           = 1.99 × 10⁻²¹ g

           ≈ 2e-21         [to 1 sig fig]

Answer:

D. 82

Explanation:

Answer:

see below

Explanation:

1. 138

2. the conversion of an atom of one element into a different element through nuclear changes

3. A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the total mass before and after the change.

4. 82

5. Some of the matter is converted to energy.

[quizlet: captncrun]

Answer:

non metals are elements and elements are pure substances

Explanation:

Answer:

Ionic bonds can form between nonmetals and metals, while covalent bonds form when electrons are shared between two nonmetals.

Explanation:

An ionic bond is formed between the electropositive and electronegative bonds. In the periodic table, it is formed between s block and p block elements.

There are different types of chemical bonds: Ionic bonds, covalent bonds, and coordinate bonds.

Ionic bonds, also known as electrovalent bonds, are a type of linkage created in a chemical molecule by the electrostatic attraction of ions with opposing charges. When the valence (outermost) electrons of one atom are permanently transferred to another atom, a bond of this kind is created.

It takes place in positively charged cation and negatively charged anion. This type of bond is seen in NaCl, CaCl2, and other molecules.

Metal and non-metal, ionic bonding form. Ionic bonds, as opposed to covalent ones, involve the transfer of valence electrons between atoms.

An ionic bond is formed between the electropositive and electronegative bonds. In the periodic table, it is formed between s block and p block elements.

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Answer:

c

Explanation:

In the modern periodic table, periods with heavier elements are longer than periods with lighter elements. This difference in period length exists because there are many more heavy elements than light elements.

The periodic table is arrangement of elements in groups and periods. Elements in the same group of the periodic table have the same number of valence electrons while elements in the same period have the same number of shells.

Period 1 contains the lightest elements, hydrogen and helium. However, in the periodic table, we notice that periods with heavier elements are longer than periods with lighter elements. This is because there are many more heavy elements than light elements.

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Answer:

1223.08632 I think....

Answer:

53

Explanation:

it is easy divide 100 by 200 and get 100

Answer:

In fact, the moon is one of the least reflective objects in the solar system. The DSCOVER spacecraft captured this single photograph of the moon and the earth. Both the earth and the moon are illuminated by the same amount of sunlight coming from the same angle in this photo.

The moon shines because its surface reflects light from the sun. And despite the fact that it sometimes seems to shine very brightly, the moon reflects only between 3 and 12 percent of the sunlight that hits it. The perceived brightness of the moon from Earth depends on where the moon is in its orbit around the planet.

Answer:

How is the bond between carbon and hydrogen in methane DIFFERENT from the bond

Explanation:

Answer:

NH4Br and NH4I are both soluble in water, and they don't react with each other. So this pair will not form precipitation.

NaClO4 and (NH4)2S are both soluble in water.  While in water, they dissociate into Na+, ClO4-, NH4+ and S2- ions, which don't react with each other.  So this pair will not form precipitation.

Ni(NO3)2 and Na2CO3 are both soluble in water.  When the 2 solutions combine, NiCO3 forms.  NiCO3 is not soluble in water, so it will precipitate out from the solution. This pair will result in precipitation.

K2SO4 and Cu(NO3)2 are both soluble in water. While in water, they dissociate into K+, SO42-, Cu2+ and NO3- ions, which don't react with each other.  So this pair will not form precipitation.

Explanation:

Hope this helps...

The characteristics of the reactivity of the periodic table allows to find the correct answers to the different questions are:

1) Metals on the right have more protons, causing valence electrons to be held more strongly.

2) They are very nonreactive.

3) Na and Br

4) Rb loses an electron

1) The reactivity of a chemical element is the tendency to combine with others, this increases as it has fewer electrons in its last layer and since they are more weakly bonded.

Consequently, halogens have seven electrons in their last shell tends to attract an electron to remain with the full level and the alkaline that an electron has in the last shell tends to lose the electron to remain with a complete shell.

If we examine the periodic table the number of electrons in the last shell decreases from right to left.

Let's review the different claims:

a) False. The elements on the right side have a higher atomic number, therefore more protons.

b) True. The elements have more protons therefore it has to attract other electrons and the reactivity decreases.

c) False. As it has more electrons, it has more energy levels, losing all the electrooens is more difficult, so the reactivity decreases.

d) False. By having more electrons it has more energy levels.

2) What is the unique characteristic of the elements of group 18

The elements of group 18 are the noble gases, they have their last full layer therefore they do not have.

the correct answer is:  They are very nonreactive.

3) The reactivity in the period table decreases with increasing period therefore the element of period 3 is the most reactive in this case Sodium and Halogen of group 5 is the most reactive in this case Bromine.

the compound Na and Br is the most reactive of all.

4) Rubidium has 1 electron in its last shell, both in a chemical reaction pole loses the electron.

the correct answer is: Rb loses an electron

In conclusion, using the characteristics of the reactivity of the periodic table, we can answer the different questions..

      1) Metals on the right have more protons, causing valence electrons to be held more strongly.

      2) They are very nonreactive.

      3) Na and Br

      4) Rb loses an electron

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The whole Patterns of Reactivity Quick Check for Honors Chemistry is

1) B. Metals on the right have more protons, causing valence electrons to be held more strongly.

2) B. by gaining electrons

3) B. They are very nonreactive

4) A. Cs and Br

5) A. Rb loses an electron

Answer:

15° C

Explanation:

30-15=15

checking* 15+15=30 or 15x2=30

Answer:

to highlight Lehmann's lifelong commitment to scientific research

Explanation:

Just took the test. I was correct.

The main reason the author includes the section "Retirement" to highlight Lehmann's lifelong commitment to scientific research. Thus, option A is correct.

An scientific research has been defined as the process that has been designed to diagnose the hypothesis which has the portion of the scientific method or procedure.

Scientific experiment has been done by the testing the particular medicine on an animal and by the observation and  the impact of the medicine on the animal as well as the reaction of the animal.

There are mainly three types of the scientific experiments and these are experiment which has been consist of the major level of the scientific experimentation. The second type has been Quasi- experimental and third type is non- experimental study or reasearch.

Therefore, The main reason the author includes the section "Retirement" to highlight Lehmann's lifelong commitment to scientific research. Thus, option A is correct.

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Answer:

false

Explanation:

they dont spontaneoulsy form water

At a fixed temperature and pressure, a cylinder contains equal volumes of O2 and an unknown gas. The identity of the unknown gas CO.

The number of moles of a given substance is calculated by dividing the mass by the molar mass.

The number of moles of O₂ = [tex]\mathbf{=\dfrac{20.0 \ g}{32 \ g/mol}}[/tex]

= 0.625 moles.

Based on the given assumption, at fixed temperature and pressure;

The molar mass of the unknown gas can be estimated as:

[tex]\mathbf{= \dfrac{mass}{number \ of \ moles}}[/tex]

[tex]\mathbf{= \dfrac{17.5 \ g}{0.625 \ moles}}[/tex]

= 28 g/mol

Therefore, we can conclude that the unknown gas is CO.

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Answer:

calcium carbonate deteriorates, delivering carbon dioxide gas and leaving behind calcium oxide a white solid. Over the long haul, this responds with carbon dioxide noticeable all around to frame gems of calcium carbonate, which lock the sand grains together to shape a hard rock-like material

Explanation:

Answer:

calium bicarbonate

Explanation:

Answer:

For a fixed mass of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. Or Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship. If volume increases, then pressure decreases and vice versa, when the temperature is held constant..

Explanation:

Hope it helps you..

Y-your welcome in advance..

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Answer:

For your first one it is C and your second one is D how deep is the lake.

Its going to be disicult to swim down at the bottom of a lake with all your class just to see how deep it is, so its better to make a model

Answer:

D. The ratio of the substances coefficients equals the ratio of their numbers of moles.

Answer:

Boron

Explanation:

Using the periodic table we can see that Period 2 represents the second row. Group 13 indicates the 13th column.