Question

Atoms of eight elements A, B,C,D,E,F,G and H have the same number of electronic shells but different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of elements A and B are basic in nature while those of E and F are acidic. The oxide of D is almost neutral. Based on the information given below answer the following questions:
1.which one of the eight elements is likely to be noble gas.
2.which one of the eight elements would have the largest atomic radius.
3.which two elements amongst these are likely to be non metal.

Answer 1

Answer:

1. H - Argon

2. A - Sodium

3. G - Chlorine

All these are elements of the 3rd period