| 1 |
Letter K is used to express theshell around the nucleus of an atom. |
- A. 1st
- B. 2nd
- C. 3rd
- D. 4th
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| 2 |
The elements of group 18 are called. |
- A. Alkali metals
- B. Noble gases
- C. Alkaline metals
- D. Transition metals
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| 3 |
Area around nucleus where electrons are found are called. |
- A. Orbit
- B. Shell
- C. Both a and b
- D. None of these
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| 4 |
In .... elements are arranged in order of increasing atomic numbers. |
- A. Group
- B. Period
- C. Orbit
- D. Shell
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| 5 |
The mass of an atom is almost due to the. |
- A. Electron
- B. Proton
- C. Nucleus
- D. Neutrons
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| 6 |
The negetively charged particle arod nucleus are called. |
- A. Electron
- B. Proton
- C. Atom
- D. Neutron
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| 7 |
How many periods are there is the Periodic table. |
- A. Five
- B. Six
- C. Seven
- D. Eight
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| 8 |
The particles of an element having different mass numbers. |
- A. Proton
- B. Neutrons
- C. Isotopes
- D. Atoms
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| 9 |
The maximum numebr of electrons that N-Shell accomodate are. |
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| 10 |
--------------- are fundamental particles of an atom. |
- A. Electron
- B. Proton
- C. Neutron
- D. All of these
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