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 the

elements A and B are basic in nature while those of E and F are acidic. The oxide of element D is

almost neutral. Answer the following questions based on the information given herein:

i. To which group or period of the periodic table do the listed elements belong?

ii. Which one of the eight elements is likely to be a noble gas?

iii. Which one of the eight elements would have the largest atomic radius?

iv. Which two elements amongst these are likely to be non¬metals?

v. Which one of these eight elements is likely to be a semi-metal or metalloid? ​

Answer 1

Answer:

i. The listed elements belongs to 3rd period

ii. Element H is likely to be a noble gas

iii. Element A has the largest Atomic Radius

iv. Elements F and G are nonmetals

v. D Element is a metalloid