Question

The atomic number of three elements A, B and Care
11, 14 and 17 respectively
(i) State the group to which these elements belong in
the modern periodic table.
(ii) Write the formula of the compound formed when
the element B reacts with C.
CBSE 2012​

Answer 1

Answer:

i) A- 1st group

B-14th group

C-17th group

ii) BC2 i.e SCl2

Answer 2

1. 11(sodium)is group 1

14 (silicon)is group 14 and

17 (chlorine)is group 16

2. sicl4