Question

For the first eighteen elements, the electrons fill the principal energy levels (electron shells), as predicted...

For the first eighteen elements, the electrons fill the principal energy levels (electron shells), as predicted by simple rules. In other words, electrons occupy the lowest electron shell that is not filled. The formula 2n2 is used to calculate the maximum capacity of each electron shell. (10 pts)

Complete the table below by filling in all the missing information. You may use your periodic table.

Element

Atomic #

Electrons present in

n = 1

n = 2

n = 3

H

1

1

0

0

He

2

2

0

0

Li

3

2

1

Be

4

B

5

C

6

N

7

O

8

F

9

Ne

10

Na

11

Mg

12

Al

Si

P

S

Cl

Ar
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