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Lena [83]
3 years ago
8

PLEASE HELP!! 15 POINTS! What could the fourth quantum number of a 2s^2 electron be?

Chemistry
1 answer:
Veronika [31]3 years ago
7 0

Answer:

option D

Explanation:

first quantum number of a 2s2

n = 2

second quantum number of a 2s2

l = 0 to n-1

l = 0, 1

For s orbital

l = 0

third quantum number of a 2s2

ml = - l to +l

ml = 0

fourth quantum number of a 2s2 electron be

?½ = spin down

½ = spin up

2s2 has 2 electrons 1 spin down and 1 spin up (starts with spin down)

ms = +1/2

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Explanation:

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<em>n = mass/molar mass.</em>

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molar mass of copper(ii) fluoride​ = 101.543 g/mol.

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3 years ago
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Explanation:

<h3>1.</h3>

The first and second expressions are additions and subtractions. When adding two numbers, the accuracy of the result is given by the number of decimal places in it. The result should have as many decimal places as the input with the least number of decimal places.

For example, in the first expression:

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<h3>2.</h3>

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When multiplying two numbers, the accuracy of the result should be based on the number of significant figures in it. The result should have as many significant figures as the input with the least number of significant figures. In this expression:

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