How many valence electrons does an atom of Ba possess?

6

1

3

2

8

Expert Solution

Number of electron in Ba = 56

Electronic configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s2

Last shell is n=6

This is valence shell

Number of electrons in n=6 is 2

So, valence is 2

Answer: 2

queen_honey_blossom answered 1 year ago

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