Barium loses ____ electrons to achieve noble gas electron configuration.
1). 1
2). 2
3). 3
4). 4
3. Question 7.28:Sea is the greatest source of some halogens. Comment.
4. The most malleable metal is
5. In a period from Li to F, ionisation potential
6. Which of the following is used to remove rust stains on cloth?
7. In nuclear reactors graphite is used as a an
9. The polymerisation of which often following is used in manufacturing of polythene in industry ?