MCQ
Effective nuclear charge increases across a period because:
Unit-4 Periodic Table and Periodicity of Properties
A
shielding decreases
B
shielding stays similar while nuclear charge rises
C
atomic radius increases
D
electrons decrease
Explanation
Same-shell electrons shield poorly, so the nucleus pulls harder across a period.
Related MCQs
According to Mendeleev's periodic law, properties of elements are a periodic function of their:
Unit-4 Periodic Table and Periodicity of Properties
View
The elements of s and p blocks are called:
Unit-4 Periodic Table and Periodicity of Properties
View
The d-block elements lie between which groups?
Unit-4 Periodic Table and Periodicity of Properties
View
Electron affinity across a period generally:
Unit-4 Periodic Table and Periodicity of Properties
View
The second ionization energy is always greater than the first because:
Unit-4 Periodic Table and Periodicity of Properties
View
Alkaline earth metals belong to which group?
Unit-4 Periodic Table and Periodicity of Properties
View