(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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Solution

(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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(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?

(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.

(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?

(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.