Across
- 2. is the positive charge present in the nucleus of an atom,
- 4. most reactive halogen in group 17
- 5. the amount released when an atom in the gaseous state accepts an electrons to form an anion
- 6. is equal to the number of protons in the nucleus i.e. the atomic
Down
- 1. from top to botttom atomic radius
- 3. elements present in group 2 and period 6