| 1 |
The elements of group 18 are called. |
- A. Alkali metals
- B. Noble gases
- C. Alkaline metals
- D. Transition metals
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| 2 |
Element present in grops have same number of ....... in their outermost shell. |
- A. Electron
- B. Proton
- C. Atoms
- D. Neutron
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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 |
The negetively charged particle arod nucleus are called. |
- A. Electron
- B. Proton
- C. Atom
- D. Neutron
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| 5 |
Formula showing maximum number of electrons in a shell. |
- A. n2
- B. 2n2
- C. 3n2
- D. 4n2
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| 6 |
Positively charged particle of an atom is 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 numebr of electorns present in an atom s equal to number of. |
- A. Nucleus
- B. Neutrons
- C. Proton
- D. Atom
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| 10 |
Letter K is used to express theshell around the nucleus of an atom. |
- A. 1st
- B. 2nd
- C. 3rd
- D. 4th
|