Question

Can someone help me ​

Answer 1

Answer:

(a) =period2

(b) =nitrogen

(c) =beryllium, nitrogen, fluorine

(d) =fluorine

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Answer 2

Answer:

here is your answer friend

Explanation:

a)period 2

b)Nitrogen is missing and it should be placed between carbon and oxygen in period 2.

c)increasing order of their electro-negativity=

berillium<nitrogen<florine

d)Neon(inert gas)

hope it helps

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