| 1 |
Mass number is number of. |
- A. Protons
- B. Neutrons
- C. Both a and b
- D. Electrons
|
| 2 |
Atomic number of th eelement of fourth position in second period. |
|
| 3 |
Number of electron in the valence shell of elements of grop 16 is. |
|
| 4 |
An element of the third period is the periodic table. |
|
| 5 |
Hydrogen and nitogen are used for teh manufacturing of. |
- A. Benaspati ghee
- B. Oxygen cylinder
- C. Hydrogen flame
- D. Urea
|
| 6 |
An atom containing two electrons. |
- A. Be
- B. Li
- C. H
- D. <div>He</div>
|
| 7 |
Bromine is |
- A. Solid
- B. Gas
- C. Liquid
- D. All of these
|
| 8 |
4th Period is periodic table is called. |
- A. Short period
- B. Normal period
- C. Long period
- D. Very long period
|
| 9 |
6th period in periodic table contains elements. |
|
| 10 |
Allowy is ......... forms of metals mixed together. |
- A. Solid
- B. Gas
- C. Normal
- D. Molten
|