the following data represents the distribution of electrons ,protons and neutrons in atoms of four elements A, B, C, D.
ELEMENTS PROTONS NEUTRONS ELECTRONS
A 19 21 19
B 17 18 17
C 17 20 17
D 18 22 18
Answer the following:
1. describe the electronic distribution in atom of element B.
2. is element B a metal or non-metal? why?

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Solution

Electronic distribution of B= 2,8,8,1
Element B is a metal because it has only one electron in valence shell and it will easily release this electron to get a stable nobel gas configuration.

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