Certain isotopes have unstable nucleus because which one of the following?

Number of protons outweighs the number of neutrons

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The number of electrons outweighs the number of protons

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The number of neutrons outweighs the number of electrons

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The number of protons outweigh the number of electrons

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The number of neutrons outweighs the number of protons

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Solution

The correct option is C The number of neutrons outweighs the number of protons
Certain isotopes have unstable nucleus because number of neutrons outweigh the number of protons.
Elements with atomic number 84 or higher and neutron to proton ratio of more than 1.5 have unstable nuclei and becomes radioactive. They spontaneously decompose.

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Similar questions

Q. Which of the following are true for an element?
(i) Atomic number = number of protons + number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic mass = number of protons = number of neutrons
(iv) Atomic number = number of protons = number of electrons

Which of the following statements is/ are correct about neutral elements?

(i) Atomic number = number of protons = number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic number = number of protons + number of electrons
(iv) Mass number = number of neutrons = number of electrons

Q. The isotopes of an element contain :

(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

Q. How many electrons, protons and neutrons are there in a nucleus of atomic number

11

and mass number

24

?
(i) number of electron

=

________.
(ii) number of protons

=

________.
(iii) number of neutrons

=

_______.

Q. Identify the correct statements.
(i) Atomic number = number of protons + number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic mass = number of protons = number of neutrons
(iv) Atomic number = number of protons = number of electrons

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