Answer:
mercury and gallium are two metals that are found in liquid state at NTP.
What is the significance of the color of the light observed in a line spectrum?
Answer:
When excited electrons fall back to the ground state, they release energy in the form of photons of light. These photons of light create the colors observed in a line-emission spectrum.
Explanation:
Helpp meeee the picture is above.
Answer:
a) 2.7 g cm³
b) 10.2 g
Explanation:
a) Density = Mass/Volume
= 21.6/8.00
= 2.7 g cm³
b) Mass = Volume × Density
= 2.55 × 4.0
= 10.2 g
Someone pls help me I will make you brain
Answer:3
Explanation:
A ball exerts a force of 10 newtons on an area of 5 cm2 find the pressure with the formula : pressure = force/area
Answer:
2
Explanation:
10/5
An ion has 56 protons, 54 electrons, and 81 neutrons. What is its atomic #?
Answer:
110.91982
The element is probably Barium
The atomic number of an atom is equal to the number of protons it has. In this case, the ion has 56 protons. Therefore, the atomic number of the ion is 56.
The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei composed of protons and neutrons, this is equal to the proton number (np) or the number of protons found in the nucleus of every atom of that element. The atomic number can be used to uniquely identify ordinary chemical elements. In an ordinary uncharged atom, the atomic number is also equal to the number of electrons.
For an ordinary atom which contains protons, neutrons and electrons, the sum of the atomic number Z and the neutron number N gives the atom's atomic mass number A. As there are 56 protons thus the atomic number of the ion is 56.
Learn more about atomic number,here:
https://brainly.com/question/16858932
#SPJ3
The formation of a covalent bond involves the
Answer:
Atoms of non metals
Explanation:
Hope it helps!
Can someone please tell me the answer on this. First person to answer will most definitely be marked brainliest so please just tell me the answer. The deadline is in 5 MINUTES!!
particles, high, low, oxygen, waste, carbondioxide, fast.
what is the only process that removes carbon from the atmosphere
Answer:
Photosynthesis process
Explanation:
Photosynthesis removes carbon dioxide naturally — and trees are especially good at storing carbon removed from the atmosphere by photosynthesis.
Your teacher has just asked you to measure out 1.24 x 1023 molecules of sodium chloride, Sodium chloride has a chemical formula of Naci. Using a Periodic Table,
determine how many grams of sodium chloride you should measure out.
A 12.08
2.12 x 1028
284 g
D 72.5 x 1021 g
Answer:
A)
Explanation:
9 ml of a sugar solution was mixed with 3 ml of a 76% sugar solution to make a 73% sugar solution. Find the percent concentration of the first solution.
what is the total number of valence electrons un xenon(xe)
Answer:
8
Explanation:
Hope this helps you :)
Answer this question will give brainliest
Explanation:
cooling
communication
heating
motion
Answer:
I believe it's all of the above
Explanation:
Because heating and cooling can be done by an AC unit, which takes electricity. Communication also takes electricity, along with lighting (especially if we're talking light fixtures to light up homes). Not to mention motion, such as cars and other transportation uses, believe it or not, electricity.
Hope this helped, also please tell me if I'm wrong.
why are metals not used on transistors and integrated circuits
Answer:
The usage of gold is generally avoided in semiconductor technology, since it acts as a deep-level trap and recombination center, i.e. charge carriers of opposite sign do recombine at Au defects in Si and get lost to the current.
Who was the first to recognize that the observations and experimental results
regarding matter could be explained by the existence of atoms?
a. Grookes
b. Rutherford
c. Ballen
d. Chadwick
H2SO4 + ………. → ZnSO4 + H2
Answer:
Zn
Explanation:
H2SO4 + Zn → ZnSO4 + H2
Zn is the answer.
Answer:
H2SO4+Zn =ZnSO4 +H2
this is the answer
I will make you brainlist answer this 1 question!
Direction: Answer the missing word
Answer:
i think it's higher for both u can try
Explanation:
why can't you balance CaC2 + H2O > Ca(OH)2 + CH4?
Answer:
Balance The Chemical Equation Cac2 H2o Ca Oh 2 C2h2 Balance the chemical equation CaC 2 + H 2 O → Ca (OH) 2 + C 2 H 2 Calcium carbide react with water to produce calcium hydroxide and acetylene.
Explanation:
CaC2 + H2O > Ca(OH)2 + CH4
Ca + 2 H2O → Ca(OH)2 + H2 - Balanced equation
What is balance equation with example?A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side. In this chemical reaction, nitrogen (N2) reacts with hydrogen (H) to produce ammonia (NH3). The reactants are nitrogen and hydrogen, and the product is ammonia
What is the balance chemical formula?Balanced chemical equation - A chemical equation in which the number of each type of atom is equal on the two sides of the equation. Subscripts - Part of the chemical formulas of the reactants and products that indicate the number of atoms of the preceding element.
To learn more about balanced chemical equation, refer
https://brainly.com/question/11345231
#SPJ2
PLS HELP Make this a brief short summary.....
Answer:
Democritus was the first person to hypothesize the existence of atoms (the idea that you can't keep dividing matter forever). Scientists did eventually prove the existence of atoms. however, they aren't completley how he imagined them.
why does iodine have a lower atomic mass than tellurium
Is this equation balanced? Explain why the equation S+3O2 → SO3 is balanced or is not balanced. Use four different words from the word bank to earn (4 points).
We can check if the equation is balanced by comparing the number of atoms of each element on the reactant and product sides. The reaction is only balanced if the number of atoms of each element is equal.
S + 3O₂ → SO₃
Reactant Product
S 1 1
O 6 3
∴ the equation is UNBALANCED since the number of atoms of oxygen on the reactant side is greater than that of the product.The balanced equation would be 2 S + 3O₂ → 2SO₃
Reactant Product
S 2 2
O 6 6
15). A covalent chemical bond is one in which A) electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged. B) protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms. C) outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms. D) outer-shell electrons of one atom are transferred to the inner electron shells of another atom. E) the inner-shell electrons of one atom are transferred to the outer shell of another atom.
Answer:
B) protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms
The equation c = 2.95 g show how much it costs to buy gas at a gas station on a certain day. n the equation c represents the cost in dollars and g represents how many gallons of gas were purchased.
Write down at least four (gallons of gas cost) pairs that fit this relationship.
The atomic number tells you the number of_______ in one atom of an element. It also tells you the number of_________ in a neutral atom of that element. The atomic number gives the indentity of an element as well as its location on the Periodic Table. No two different element will havr the________ atomic number
Explanation:
script ok script ok ok ok
what is the frequency of a 2,600 cm wave
Answer: 1.15 × 10⁷ Hz
Explanation:
Frequency = Speed of Light ÷ Wavelength
= (2.99 × 10⁸ m/s) ÷ (2.6 × 10 m)
= 1.15 × 10⁷ Hz
The frequency of a wave of wavelength 2600 cm is 1.15 × 10⁷ Hz
Notes:
Hz ≡ /s
1 m = 100 cm
The frequency of a 2,600 cm wave is 1.15 × 10⁷ s⁻¹
From the question,
We are to determine the frequency of a wave with wavelength 2600 cm.
Using the formula
[tex]c = \nu \lambda[/tex]
Where c is the speed of light (c = 3.0 × 10⁸ m/s)
[tex]\nu[/tex] is the frequency
[tex]\lambda[/tex] is the wavelength
Then, we can write that
[tex]\nu = \frac{c}{\lambda}[/tex]
From the question
λ = 2600 cm = 26 m
Putting the parameters into the formula, we get
[tex]\nu = \frac{3.0 \times 10^{8} }{26}[/tex]
[tex]\nu = 0.11538 \times 10^{8}[/tex]
[tex]\nu \approx 1.15 \times 10^{7} \ s^{-1}[/tex]
Hence, the frequency of a 2,600 cm wave is 1.15 × 10⁷ s⁻¹
Learn more here: https://brainly.com/question/18921992
explain the periodic table law of element
Elements of the periodic table are arranged in order of increasing atomic number. The periodic law states “When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties.”
Which characteristics of sedimentary rocks allow them to preserve fossils?
O A. high heat, high pressure
O B. high heat, low pressure
O C. low heat, high pressure
O D. low heat, low pressure
Which of these element is NOT an alkali metal? Na Rb H cs
Answer: Hydrogen-H
Explanation: Hydrogen is a gas, the most abundant element in the universe and the simplest of them all
what is the acceleration due to gravity of the moon
Knowing an object's position requires which of the following? A. speed B. time C. displacement D. reference point
Knowing an object's position requires the (D) reference point
Reference point is the starting point use to locate another place or object. an object's position depends on reference point.
Position describes the distance and direction from reference point for an object. position of an object's is the location to the reference point.
Displacement is the difference between the initial position and the final position.
Speed is defined as the distance an object travels per unit time.
Time is defined as the duration of an object travels to cover a distance.
so according to all , reference point is needed to determine the position of an object's.
Thus, Knowing an object's position requires the (D) reference point
To learn more about reference point here
https://brainly.com/question/11823812
#SPJ1
coal mining environmental impact
Explain what impact coal mining has and what it affects
CAN SOMEONE PLS HELP THANK U
Answer:
There are significant environmental impacts associated with coal mining and use. It could require the removal of massive amounts of top soil, leading to erosion, loss of habitat and pollution. Coal mining causes acid mine drainage, which causes heavy metals to dissolve and seep into ground and surface water.
Explanation: