| 1 |
Which one of the following is a metalloid element. |
- A. Gold
- B. Boron
- C. Silver
- D. Nitrogen
|
| 2 |
Water, carbon dioxide, ammonia and methane are examples of. |
- A. Atoms
- B. Elements
- C. Compounds
- D. Mixture
|
| 3 |
Choose an atom which can-exist idenpendently at room temperature. |
|
| 4 |
Which of the following state has specific shape and volume. |
- A. Gas
- B. Solid
- C. Liquid
- D. Both a and b
|
| 5 |
How many hydrgen atos are present in 1 molecule of ammonia. |
|
| 6 |
How many atoms are present in one molecule of helium. |
|
| 7 |
Number of the neutrons in helium element. |
|
| 8 |
Which one of the following is metallic element. |
- A. Hydrogen
- B. Helium
- C. Lithium
- D. Carbon
|
| 9 |
The symbol of Lithum is. |
|
| 10 |
The number of proton present in atom is called. |
- A. Atomic number
- B. Atomic mass
- C. Atomic weight
- D. Mass
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