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प्रश्न
Match the statements in List I with the correct answer from List II.
| List I | List II |
| 1. Mass number of an atom is the number of protons and | A: Electron |
| 2. The sub-atomic particle with a negligible mass. | B: Argon |
| 3. An atom having stable electronic configuration. | C: Nitrogen |
| 4. A molecule formed by sharing of electrons [covalency] | D: Sodium |
| 5. A metallic atom having unstable electronic configuration. | E: Neutrons |
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उत्तर
| List I | List II |
| 1. Mass number of an atom is the number of protons and | E: Neutrons |
| 2. The sub-atomic particle with a negligible mass. | A: Electron |
| 3. An atom having stable electronic configuration. | B: Argon |
| 4. A molecule formed by sharing of electrons [covalency] | C: Nitrogen |
| 5. A metallic atom having unstable electronic configuration. | D: Sodium |
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संबंधित प्रश्न
Explain the Mass number with example.
FILL IN THE BLANK
Rutherford won the Nobel Prize in 1908 for his investigations in the field of ......................
Tick the most appropriate answer.
Which of these have similar chemical properties but different set of physical properties and mass number?
- isobars
- elements
- isotopes
- none of these
(a) Which of the nuclear particles is present in the same fixed number in the atoms of any particular element?
(b) What do we call this number which is characteristic of a particular element?
The atomic number of four elements A, B, C and D are 12, 13, 15 and 3 respectively. The element which cannot form a cation is :
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Silicon [At. no. = 14, Mass no. = 28]
Which of the following are true for an element?
- Atomic number = number of protons + number of electrons
- Mass number = number of protons + number of neutrons
- Atomic mass = number of protons = number of neutrons
- Atomic number = number of protons = number of electrons
What is a neutron?
When an atom gives electrons from its outermost shell, it becomes ______ charged.
If element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
