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प्रश्न
Give the following a suitable word/phrase.
Atoms of same element with same atomic number but a different mass number.
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उत्तर
Isotopes
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संबंधित प्रश्न
Name the particles which actually determine the mass of an atom.
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 :
The properties of the elements are a periodic function of their __________.
The atomic number and mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement?
An atom of an element has two electrons in the M shell.
What is the (a) atomic number (b) number of protons in this element?
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Oxygen – \[\ce{^16_8O}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
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 |
The particles that make up the atom are called ______ particles.
______ = No. of protons = No. of the electrons.
Compare the charge and mass of protons and electrons.
