Question

Give two examples of each of the following

1. polyatomic ions

2. Cations

3 Anions 4

4. Member of group 13

5. second period element

6. Divalent elements

7. Elements with chemical symbol having two alphabets.

8. polyatomic elements



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Answer 1

1. hydoxide , hydrogen carbonate
2. sodium , pottasium
3. chlorine , florine
4. BORON , ALLUMINIUM
5. MAGNESIUM , BERYLIUM
6. SAME AS 6
7. MAGNESIUM SODIUM
8. SULPHUR

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Answer 2

1] NH4+ , CN-

2] Ca2+ , Na+

3] Br- , Cl-

4] Boron , Aluminium

5] Lithium , Berilium

6] Calcium , Magnesium

7] Na , Mg

8] Bromine , Chlorine