Identify an element that does NOT belong to period 4.

Correct option is D

The correct answer is (d) Lithium

• Lithium is an element in Period 2 of the periodic table, not in Period 4. It is located in Group 1, known as alkali metals.

• Zinc (A), Potassium (B), and Calcium (C) are all in Period 4.

  • Zinc (A) is in Group 12, a transition metal.

  • Potassium (B) is in Group 1, an alkali metal.

  • Calcium (C) is in Group 2, an alkaline earth metal.

Information Booster:

• Period 4 elements begin with Potassium (K) and go up to Krypton (Kr), covering a wide range of elements across different groups.

• Lithium, a light metal, is essential in batteries and mental health treatment, but it belongs to Period 2 and is chemically distinct from Period 4 elements.

• Potassium is highly reactive and is used in fertilizers, Calcium is crucial in bone structure, and Zinc is vital for immune function.

Additional Information:

• Lithium is in Period 2, a much lighter and smaller period than Period 4.

• Period 4 includes heavier elements such as Zinc and Potassium, and is essential for both biological functions and industrial applications