Science, asked by salodiaryp2ence, 1 year ago

an element has 2 electrons in its N shell it reacts with a non metal of atomic number 7 the compound formed reacts with water and produces a basic gas.identify the elements and write the balanced chemical reactions ​

Answers

Answered by khushi745160
40

Answer:

first element is Calium and the other element is nitrogen

Explanation:

an element which has 2 electrons in its N shells clearly indicates that its K, L and M shells are completely filled which means

2 ( electrons in K shell) + 8 ( electrons in L shell) + 8 ( electrons in M shell) + 2 ( electrons in N shell which is already given in ques. ) = 20

we know 20 is the atomic no. of calcium

therefore first element is calcium

Nitrogen has atomic number '7' and it is also a non-metal.

therefore another element is nitrogen

when calcium and nitrogen reacts, I they form calcium nitride

3Ca (s) + N2 (g) ----> Ca3N2

when this compound reacts with water it gives calcium hydroxide and ammonia

Ca3N2 + 6H2O ---> 3Ca(OH)2 + 2NH

here ammonia is the basic gas mentioned in the question

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