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Chemistry

1 answer:

matrenka [14]2 years ago

6 0

Explanation:

The problem here is to find the atomic number of each of the element given.

Sum the powers of the configuration.

a- 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

Atomic number is = 2 + 2 + 6 + 2 + 6 + 1 = 19

b- 1s² 2s² 2p⁶ 3s² 3p⁴

Atomic number = 2 + 2 + 6 + 2 + 4 = 16

c- 1s¹

Atomic number = 1

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