Question

25 marks
OBJECTIVE TYPE QUESTIONS
Atomic Structure
-1 Fill in the blanks with the correct words from the brackets.
1. A molecule of an element is.
- [water / chlorine/ ammonia).
2. A radical with one atom of sulphur & three atoms of oxygen is
(bisulphite/ sulphate/sulphite).
3. An element with variable valency is - [sodium/copper/calcium]
4. The formula of aluminium sulphate is [AISO/Al2(SO4)3/Al2(SO2)2].
5. The element lithium in the Modern Periodic Table with valency 1* belongs to the group
(2/1).​

Answer 1

Explanation:

1 chlorine

2 sulphate

3 copper

4 Al2(SO4)3