| 1 |
The particles of an element having different mass numbers. |
- A. Proton
- B. Neutrons
- C. Isotopes
- D. Atoms
|
| 2 |
The charge present on atom is |
- A. Positive
- B. Negative
- C. Both a and b
- D. Neutral
|
| 3 |
The negetively charged particle arod nucleus are called. |
- A. Electron
- B. Proton
- C. Atom
- D. Neutron
|
| 4 |
Atomic number of element presetnin period 2 and group 15 of the periodic table. |
|
| 5 |
The maximum numebr of electrons that N-Shell accomodate are. |
|
| 6 |
Element present in grops have same number of ....... in their outermost shell. |
- A. Electron
- B. Proton
- C. Atoms
- D. Neutron
|
| 7 |
Area around nucleus where electrons are found are called. |
- A. Orbit
- B. Shell
- C. Both a and b
- D. None of these
|
| 8 |
The elements of group 18 are called. |
- A. Alkali metals
- B. Noble gases
- C. Alkaline metals
- D. Transition metals
|
| 9 |
The central part of an atom is called. |
- A. Electron
- B. Proton
- C. Neutron
- D. Nucleus
|
| 10 |
The mass of an atom is almost due to the. |
- A. Electron
- B. Proton
- C. Nucleus
- D. Neutrons
|