1. Modern periodic law had been given by (1)
- 1. Moseley
- 2. Mendeleev
- 3. Lother-Mayer
- 4. Lavoisier
2. Which one is known as father of periodic table (3)
- 1. Lavoisier
- 2. Rutherford
- 3. Mendeleev
- 4. Bohr
3. Helogens belong to the – (2)
- 1. s-block
- 2. p-block
- 3. d-block
- 4. f-block
4. In modern periodic table, the number of period is (3)
- 1. 2
- 2. 6
- 3. 7
- 4. 8
5. In modern periodic table, the group number is (4)
- 1. 15
- 2. 16
- 3. 17
- 4. 18
