Question
Identify an element that does NOT belong to period 4.
This question was previously asked in
PYST : General Awareness - SSC Stenographer 2024 (Tier-I) (10-Dec-2024) (Shift 2)
The correct answer is
Lithium
The correct answer is Lithium (Li).
The periodic table organizes elements by their atomic structure, specifically the number of electron shells (periods) and the number of valence electrons (groups). Elements in the same period have the same number of electron shells.
Let's examine the given options:
- Potassium (K): Belongs to period 4.
- Calcium (Ca): Belongs to period 4.
- Lithium (Li): Belongs to period 2.
- Zinc (Zn): Belongs to period 4.
Since Lithium is located in the second period of the periodic table, while the rest belong to the fourth period, it's the element that doesn't fit.
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