Ionization energy is directly proportional to the atomic radius and the effective nuclear charge.

False

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True

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Solution

The correct option is A False

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Ionization energy is directly proportional to the atomic radius and the effective nuclear charge.

Ionization energy is directly proportional to the atomic radius and the effective nuclear charge. (True/False)

Q. Assertion: First ionization energy for nitrogen is lower than oxygen
Reason: Across a period effective nuclear charge decreases

Ionic radii vary in
(a) inverse proportion to the effective nuclear charge
(b) Inverse proportion to the square of effective nuclear charge
(c) direct proportion to the screening effect
(d) direct proportion to the square of screening effect

Q. The covalent radius of arsenic atom is 1.21

˙ A

and effective nuclear charge of 4p electrons is equal to 6.4. The electronegativity of arsenic atom is ?

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