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Question : Which of the following is radioactive?

Option 1: Helium

Option 2: Sodium

Option 3: Thorium

Option 4: Platinum


Team Careers360 2nd Jan, 2024
Answer (1)
Team Careers360 21st Jan, 2024

Correct Answer: Thorium


Solution : The correct option is Thorium .

Thorium, with the chemical symbol Th and atomic number 90, is a metallic chemical element that emits relatively little radioactivity. Both French scientist Marie Curie and German chemist Gerhard Carl Schmidt independently discovered thorium's radioactivity in 1898. It is a radioactive metal that is present in nature in trace amounts.

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