Question

an element has atomic number 5 belongs to ____ group​

Answer 1

Answer:

The electronic configuration of the element with atomic number 12 is 1s

2

2s

2

2p

6

3s

2

.

The number of valence electrons =2, which means it belongs to group II A.

The valence shell is 3, which means it belongs to the third period.

Explanation:

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Answer 2

Answer:

platinum group has 5 atomic no.