Question

An Element X has a Mass Number 4 and Atomic Number 2.

Write the Valency of this Element.​

Answer 1

Answer:

Answer: We know that only valence electrons take part in bond formation with different atoms.In the atom of 'X' element there are only two electrons since atomic number is 2. Thus, K shell is fully filled for this atom. Hence,its valency is zero.

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Answer 2

Solution :-

Atomic Number of the Element = 02

Hence, Number of Electrons present in that Element = 02

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Thus, the Element has only K Shell containing 2 Electrons, (i.e.), a Complete Duplet.

Hence, the Valency of this Element = 0

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