Write the following information about the element ‘X’. i) Atomic number of ‘X’ ii) Valence electrons iii) Atomic mass of ’X’ iv) Valency of ‘X’.
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Atomic number = Number of protons = 8
Atomic mass = Number of protons + Number of neutrons = 8 + 10 = 18 u
Valence electrons = 6
Valency of ‘X’ = 8 - 6 = 2
‘X’ should be non-metal because there are six valence electrons hence it will take two more electrons to complete its outermost shell
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