1. Which of the following atoms will form an ion of charge -2

a. atomic no 12 mass no 24
b. . atomic no 14 mass no 28
c. . atomic no 10 mass no 20
d. . atomic no 8 mass no 16

d. . atomic no 8 mass no 16

2. Which of the following atom will not form cation or anion

a. atomic no 16
b. atomic no 17
c. atomic no 18
d. atomic no 19

c. atomic no 18

3. Which of following atom will form catin

a. atomic no 20
b. atomic no 18
c. atomic no 17
d. atomic no 15

a. atomic no 20

4. Which of following atom obey duplet rule

a. O2
b. F2
c. N2
d. H2

d. H2

5. Silicon belongs to group IVA. It has …. electrons in the valence shell

a. 1
b. 3
c. 4
d. 6

c. 4

6. Phosphorous belongs to third period of group VA. How many electrons it need to complete its valence shell

a. 2
b. 3
c. 4
d. 5

b. 3

7. In the formation of AlF3, Aluminium atom looses….. electrons

a. 1
b. 2
c. 3
d. 4

c. 3

8. Which of following is not true about formation of Na2S

a. Each sodium atom looses one electron
b. Sodium forms cation
c. Sulphur forms anions
d. Each sulphur atom gains one electron

d. Each sulphur atom gains one electron

9. Identify the covalent compound

a. NaCl
b. MgO
c. H2O
d. KF

c. H2O