Question

25 marksOBJECTIVE TYPE QUESTIONSAtomic 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

Answer:

1. Chlorine

2. Sulphite

3.Copper

4.Al2(SO4)3

5.Group 1

Explanation:

1. Water and Ammonia(NH3) contain two elements whereas chlorine is just one element.

2. Sulphite - SO3

3.Copper is a transition element hence shows variable valency

4.Valency of sulphate is 2 AND aluminium is 3.

5.Lithium belongs to group 1