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प्रश्न
(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?
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उत्तर
(a) The number of protons present in the atom of any particular element i.e., the atomic number is fixed.
(b) This number which is the characteristic of a particular element is called its atomic number.
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संबंधित प्रश्न
An element has an atomic number 12. How many electrons will be present in the K, L and M energy shells of its atom?
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
The number of electrons in the atom of an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of an atom of this element ?
From the symbol `""_12^24"Mg"`
, state the mass number, the atomic number and electronic configuration of magnesium.
If an atom ‘A’ has mass number 35 and atomic number 17, state the number of protons, electrons and neutrons it contains.
Define the term of atomic number.
Differentiate mass number from atomic number.
Name the 3 sub-atomic particles of an atom.
Explain the following terms.
- Proton
- Electron
- Neutron.
Compare the charge and mass of protons and electrons.
