Question

In normal elements of a particular period the electrons are gradually filled in

..................... shell.

4. All elements of a particular group have ..................... electronic configurations.

5. In the modern periodic table, groups are numbered from ..................... to

.....................

6. The second and third periods of the periodic table are called .....................

periods.

7. The main group elements are present in group 1 and 2 on the left side and

..................... to ..................... on the right side of the periodic table​

Answer 1

Answer:

1. valence

2. same

3. 1 to 18

4. representative

5. 17 to 18