Question

If an atom 'A' has atomic number 19 & mass number 39, state -
i] Its electronic configuration. ii] The number of valence electrons it possesses.
Give me the answer​

Answer 1

Answer: potassium (atomic no. -19)

1] K. L. M. N

2. 8. 8. 1

2] +1

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Answer 2

Answer :

1. Electronic Configuration — 2,8,8,1
2. No. of Valence Electrons — 1

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