Isotopes have same........... number but different ................. number.

mass, atomic

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atomic, mass

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neutron, proton

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neutron, electron

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Solution

The correct option is B
atomic, mass

Isotopes are defined as the atoms of the same element, having the same atomic number but different mass numbers.

The number of protons in all the atoms of a particular element is same, therefore to have different mass numbers, isotopes contain different number of neutrons.

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Question 07

Two atoms are said to be isobars if ?

(a) They have same atomic number but different mass number

(b) They have same number of electrons but different number of neutrons

(d) Sum of the number of protons and neutrons is same but the number of protons is different

Isotopes have same number of protons but different number of neutrons.

(a) same number of neutrons but different number of protons

(b) same number of neutrons but different number of electrons

(d) different number of neutrons but same number of protons

Nuclei with the same number of protons but a different number of neutrons are called isobars

Nuclei with the same number of neutrons but a different atomic number are called isotopes

Nuclei with the same mass number are called isotones

_{Z} X^{A}

(^{16} O,^{17} O,^{18} O)

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