Question

Assertion:
Atoms with large atomic radii and low ionization potential are more metallic in nature.
Reason:
Atoms with large atomic radii and low ionization potential have a tendency to lose electrons.
A. Both assertion and reason are correct and reason is the correct explanation for assertion.
B. Both assertion and reason are correct but reason is not the correct explanation for assertion.
C. Assertion is correct but reason is incorrect.
D. Reason is correct but assertion is incorrect.

Answer 1

Hint: Atomic radius of a chemical element can be defined as a distance from the center of nucleus to the outermost shell of an electron. Atomic radius can be calculated by experimental measurements or from theoretical models.

Complete Solution :
- The trend followed by atomic radii generally decreases along the period and increases down the group. Ionization potential can be described as the amount of energy needed to remove the most loosely bound electron i.e. electron present in the outermost electron from an isolated gaseous atom of an element in its lowest energy state or also known by ground state to produce a cation is known as ionization potential or ionization energy.
- Atoms with large atomic radii and low ionization potential are more metallic in nature this can be explained by the reason that they can easily lose their valence electrons. As the nuclear pull on valence electrons is less due to which the ionization potential is small and they can form a cation easily without absorbing much energy.
So, the correct answer is “Option A”.

Note: Ionization potential is an endothermic process which is generally expressed by the term I or I.P. and measured in electron volts. Energy removed to the first electron is called first ionization energy and to remove second electron it is termed as second ionization energy and so on in their respective manner.