Question

1. which of the following elements is a transition metal?

a) magnesium

b) oxygen

c) cobalt

d) calcium

Explanation:

Identify the periodic table classification of each option

• Magnesium: Group 2 (Alkaline Earth Metal)
• Oxygen: Group 16 (Nonmetal)
• Cobalt: Groups 3–12 (Transition Metal, d-block)
• Calcium: Group 2 (Alkaline Earth Metal)

Select the element that is a transition metal

• Cobalt is a transition metal located in Group 9, Period 4.

Answer:

• A) magnesium
• B) oxygen
• C) cobalt (Correct answer)
• D) calcium