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vladimir1956 [14]
3 years ago
11

How many valance electrons does He need to get to 8

Chemistry
1 answer:
mote1985 [20]3 years ago
5 0

Answer:

Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons

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Imagine a balloon is made from a membrane that's permeable to water but not sucrose molecules. How would the concentration of su
Blababa [14]

Answer:

The concentration of sucrose will decrease.

Explanation:

The balloon contains 50% sucrose solution.

Diffusion is the net movement of the substance from the region of the higher concentration to the region of the lower concentration.

Given that the membrane is only permeable to water not sucrose. So, movement of sucrose will not take place. <u>When the balloon is placed in a beaker of water, by the process of diffusion, the water moves from beaker to balloon and thus, the balloon will expand and the concentration of sucrose solution will decrease.</u>

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3 years ago
What mass will 33.6 L of chlorine gas (Cl2) have at STP?
chubhunter [2.5K]

Answer:

The answer is D.) 106 g

I hope I helped! ^-^

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3 years ago
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A salt is best described as a compound that is formed from the reaction between
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An acid and a base
For example
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3 years ago
The balmer series is a group of spectral lines resulting from the decay of an excited electron in a hydrogen atom to what atomic
mel-nik [20]

Every line in the hydrogen spectrum that was in the visible light area had a relationship to a single number, which caught Balmer's attention. Its numeric value was 364.50682 nm. Any number more than 2 may be squared, divided by itself squared minus 4, and then multiplied by 364.50682 to obtain the wavelength of another line in the hydrogen spectrum (see the equation below). His formula predicted lines that were later discovered but had not yet been detected, allowing him to demonstrate that certain measurements of lines performed in his era using spectroscopy were somewhat off. He also turned out to be the series' capstone in terms of number.

The Balmer equation was first stated as follows (apart from a notation adjustment to provide Balmer's constant as B), and it could be used to determine the wavelength of the absorption/emission lines:

$\lambda=B\left(\frac{n^{2}}{n^{2}-m^{2}}\right)=B\left(\frac{n^{2}}{n^{2}-2^{2}}\right)$

Where

$\lambda$ is the wavelength.

B is a constant with the value of 3.6450682 \times 10^{-7} \mathrm{~m}$ or $364.50682 \mathrm{~nm}$.

m is equal to 2

n is an integer such that $n > m$.

What is the atomic energy level?

  • The set distances from an atom's nucleus where electrons may be found are referred to as energy levels (also known as electron shells).
  • In an atom, the small, positively charged nucleus is surrounded by smaller, negatively charged electrons.
  • Energy levels resemble the rungs of a ladder in several ways.

So the more about atomic energy level visit.

brainly.com/question/3930010

#SPJ4

4 0
2 years ago
Pls help me with this question thank you
klemol [59]
Mass times acceleration
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