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3 years ago

What does the period number tell about the energy levels occupied bye electrons in an atom

Chemistry

1 answer:

anyanavicka [17]3 years ago

3 0

Answer:

The period number tells which is the highest energy level occupied by the electrons.

Explanation:

The period number (denoted by n) is the outer energy level that is occupied by electrons in an atom.
The period number that an element is in, is the number of energy levels that the element has.
When we move across a period from left to right in a periodic table the number of electrons in atoms increases within the same orbit.

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DaniilM [7]

Answer:

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2 years ago

What is the formula of sulfurous acid?<br> H2S<br> HSO4<br> H2SO4<br> H2SO3

Bas_tet [7]

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4 years ago

If one adds 0.1 mol of the weak acid hf (pk_a = 3.2) to a solution with a ph = 2, which species would be most abundant and how m

zavuch27 [327]

$F^{-}$ is most abundant and 6310 times more than HF.

<h3>What is a strong and weak acid?</h3>

When an acid is dissolved in water, all of its molecules disintegrate, making the acid powerful.

When an acid is dissolved in water, only a small number of its molecules disintegrate, making the acid weak. Strong acids have a lower pH than weak acids.

The powerful acids include perchloric acid, chloric acid, nitric acid, sulfuric acid, hydrobromic acid, and hydroiodic acid.

Given:

Pka=3..2

pH=7

Let the volume be 1 liter

[HF]=01 M

$pH=pka+log \frac{F^{-}}{HF} \\\\7=3.2+log\frac{F^{-}}{HF} \\3.8=log\frac{F^{-}}{HF}\\ \frac{F^{-}}{0.1}=10^{3.8} \\F^{-}=630.95 M$

Now,

$\frac{F^{-}}{HF}=\frac{630.95}{0.1}\\ =6309.57$

F-:HF= 6309.57:1

Therefore, the most abundant is $F^{-}$ and has 6310 times more than HF is $F^{-}$ .

To know more about strong and weak acids, visit: brainly.com/question/12811944

#SPJ4

4 0

2 years ago

What is the molarity of 200 mL of solution in which 2.0<br> molesof sodium bromide is dissolved?

vodomira [7]

Answer:

10 M

Explanation:

Molarity -

Molarity of a substance , is the number of moles present in a liter of solution .

M = n / V

M = molarity

V = volume of solution in liter ,

n = moles of solute ,

From the question,

V = 200mL

Since, 1L = 1000mL ,

1 mL = 0.001 L

Hence,

V = 200mL = 0.2 L

n = 2.0 mol

Hence, to calculate the molarity of the solution, the above formula can be used as -

M = n / V

M = 2.0 mol / 0.2 L = 10 M

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3 years ago

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Nataliya [291]

Answer:

I just umm

Explanation:

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3 years ago