Assertion: lonisation enthalpy is inversely proportional to atomic radii.
Reason: Atomic radii depend on nuclear charge.

Types of Atomic Radii

Correct order of atomic radii is

The order of increasing atomic radii is

Give reasons for Atomic size of an element depends on the nuclear charge of that element.

The atomic radii of transition elements in a period are.

Atomic radii of Ti, Zn and Hf vary.

Assertion : The pressure of a gas is inversely proportional to its volume at constant temperature and n. Reason : The gas volume is directly proportional to n at constant temperature and pressure .

Assertion:The atomic size generally increases across a period and decreases down the group. Reason:Atomic size depends upon valence shell electronic configuration.

Assertion (A): Alkaline earth metals are harder than alkali meatals. Reason (R ): Atomic radii of alkaline earth metas are smaller thant the corresponding alkali metals in the same period.

Assertion:Atomic number is a more fundamental property of an element than its atomic mass. Reason:Atomic number is equal to number of protons in an atom.