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Agata [3.3K]
2 years ago
12

The model below shows a calcium atom.

Biology
2 answers:
algol132 years ago
7 0

Answer:

B.8

Explanation:

Ca=20

K L M N

2 8 8 2

The third energy level of an atom (with atomic number 20 and above) contains 8 electrons.

malfutka [58]2 years ago
4 0

first energy level:1s2=2 electrons

2nd energy level:2s2 2p6=8 electrons

<em><u>3rd energy level 3s2 3p6=8 electrons</u></em>

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