Question

The atomic number and mass number of an element are 16 and 32 respectively. Find the number of protons, electrons and neutrons in it. State its valency. Is this element a metal or a non – metal. Justify your, answer.
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Answer 1

Answer:

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No. of protons = Atomic number =16

No. of electrons = Atomic number =16

No. of neutrons = Mass number – Atomic number = 32-16 = 16

Electronic configuration of the element = 2, 8, 6

Valency of the element = (8 – 6) = 2

The element is a non – metal since it tends to gain electrons and not lose electrons.

Answer 2

a) No. of protons = atomic number = 16

No. of electrons = no. of protons = 16

No. of neutrons = Mass number - atomic number

= 32 - 16

= 16

b) Electronic configuration of element: 2, 8, 6

So, Valency = 8 - no. of valence electrons

= 8 - 6

= 2

c)The element is a non metal because it has 6 valence electrons and hence belongs to group 16.

Te Amo