Identify the element one that does NOT belong to Group 1 of the Modern Periodic Table ........

General Studies (CGL) General Science

Identify the element one that does NOT belong to Group 1 of the Modern Periodic Table.

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Combined Graduate Level Examination Tier I 2023

Sodium

Lithium

Hydrogen

Rubidium

- Sodium (Na):

- Part of Group 1 in the Periodic Table, known as alkali metals.

- Highly reactive, especially with water.

- Lithium (Li):

- Also in Group 1 of the Periodic Table.

- Lightest metal and reacts with air and water.

- Hydrogen (H):

- Does not belong to Group 1 despite often being placed above it.

- Unique properties distinct from alkali metals.

- It’s a non-metal and forms diatomic molecules.

- Rubidium (Rb):

- Another member of Group 1.

- Reacts violently with water.

- Correct Answer: Hydrogen (Option 3)

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