Assertion: All the isotopes of a given element show same chemical behaviour. Reason: Isotopes have different number of neutrons present in the nucleus.

Question

Assertion: All the isotopes of a given element show same chemical behaviour. Reason: Isotopes have different number of neutrons present in the nucleus. (A) If both assertion and reason are true and reason is the correct explanation of assertion. (B) If both assertion and reason are true but reason is not the correct explanation of assertion. (C) If assertion is true but reason is false. (D) If both assertion and reason are false.

Tardigrade Admin · Accepted Answer

Isotopes are defined as the atoms with same atomic number (protons or electrons) but different mass number (or neutrons). Mass number determines the physical properties such as boiling/melting/density etc. But chemical properties are governed by atomic number (number of electrons) and thus isotopes have similar chemical properties.

Q. Assertion: All the isotopes of a given element show same chemical behaviour. Reason: Isotopes have different number of neutrons present in the nucleus.

If both assertion and reason are true and reason is the correct explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If both assertion and reason are false.

Q. Assertion: All the isotopes of a given element show same chemical behaviour.
Reason: Isotopes have different number of neutrons present in the nucleus.