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An atom X has 4 protons and 5 neutrons with electronic configuration 2, 2. Give information about its

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An atom X has 4 protons and 5 neutrons with electronic configuration 2, 2. Give information about its

(i) atomic number (ii) mass number (iii) valency

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Number of protons of atom X = 4

Number of neutrons = 5 

Electronic configuration = 2, 2 

(i) Atomic number of atom X = 4 

(ii) Mass number = 4 + 5 = 9 

(iii) Valency = 2

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