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
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