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masha68 [24]
3 years ago
5

Which is the best explanation for why the helium atom below is stable?

Chemistry
2 answers:
Sphinxa [80]3 years ago
7 0
I would say that the answer is A. Hope this helps. :)
RoseWind [281]3 years ago
7 0
Answer A because The first energy level consists of 2 electrons in the first energy level 8 in the second 18 in the third and 32 in the 4th. (if u want to go deeper 8 electrons makes an energy level happy so you wouldn't need 32 or 18 you would just need 8.
You might be interested in
The density of a gold nugget is 19.3 g/cm3. If the volume of the gold nugget is 0.00369 L the mass of the nugget is
Sauron [17]

Answer:

The answer to your question is 71.22 g

Explanation:

Data

Density = 19.3 g/cm³

Volume = 0.00369

mass = ?

Formula

Density = \frac{mass}{volume}

Solve for mass

mass = density x volume

Process

1.- Convert volume from liters to cubic centimeters

                 1 l ----------------  1000 cm³

             0.00369l ---------   x

                x = (0.00369 x 1000 ) / 1

                x = 3.69 cm³

2.- Substitution

       mass = 19.3 x 3.69

3.- Simplification and result

       mass = 71.22 g

6 0
3 years ago
An increase in mass will​
maks197457 [2]

Answer:

As an object increases in speed, so does the amount of energy that it has, this energy is what we refer to as 'the increase in mass'

Explanation:

E

3 0
4 years ago
A neutral atom has the atomic number of 10 and the atomic mass is 22 amu. what is the number of neutrons and electrons for this
Leviafan [203]

Hey there!

This atom has 10 protons.

If this atom has an atomic mass of 22, that means the sum of protons and neutrons is 22.

p + n = 22

p = 10

Which makes this true:

10 + n = 22

Subtract 10 from each side to solve for n, the number of neutrons.

n = 12

An atom that has the atomic number of 10 and an atomic mass of 22 has 12 neutrons.

Hope this helps!

8 0
3 years ago
Water vapor is not usually seen.
xeze [42]

Answer:

True

Explanation:

Water vapor is totally invisible.

Without it, there would be no clouds or rain or snow, since all of these require water vapor in order to form. All of the water vapor that evaporates from the surface of the Earth eventually returns as precipitation - rain or snow.

Helped by the <u><em>One</em></u> & <u><em>Only</em></u> <u><em>#QUEEN</em></u> aka <u><em>#DRIPPQUEENMO </em></u>

<u><em>Hoped this helped! :)</em></u>

5 0
3 years ago
A solution has [OH-]=3.5*10^-6. Based on that, what must be true about this solution?
Volgvan

Answer:

Option B. It is a basic solution.

Explanation:

To know which option is correct, let us calculate the pH of the solution.

First, we shall determine the pOH of the solution. This is illustrated below:

Concentration of Hydroxide ion, [OH¯] = 3.5×10¯⁶

pOH =.?

pOH = –Log [OH¯]

pOH = –Log 3.5×10¯⁶

pOH = 5.5

Finally, we shall determine the pH. This can be obtained as follow:

pOH = 5.5

pH =?

pH + pOH = 14

pH + 5.5 = 14

Collect like terms

pH = 14 – 5.5

pH = 8.5

The pH scale reads as follow:

0 to 6 => Acidic

7 => Neutral

8 to 14 => Basic

Comparing the pH of the solution (i.e 8.5) with the pH scale, we can conclude that the solution is basic because the pH of solution lies between 8 and 14.

5 0
3 years ago
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