Question

answer it please and please show the full solution​

Answer 1

Answer:

(a) Number of electrons are 10 and number of protons are 10.

(b) Mass number = Number of neutrons + Number of protons.

Mass number = 10 + 10 = 20.

Mass number is 20 u .

Atomic number is 10.

(c) Electronic configuration is 2,8 , K shell = 2 and L shell = 8 .

(d) Symbol of X is Ne.

(e) Representation → $\boxed{ \bold{\sf ^{Mass \: no.} Symbol \: of \: element _{Atomic \: no.}}}$

Representation of element X → ²⁰X₁₀

Or, Element is Ne → ²⁰Ne₁₀ .

Mass number : The total number of neutrons and electrons is mass number.

Atomic number : Number of protons present in nucleus is atomic number.

Answer 2

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