WBCS.LIVE practice question

What are isotopes?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Atoms of an element having the same atomic number and mass number and hence their physical properties are the same.
  2. Different forms of an element that have the same atomic number and mass number but have different physical properties
  3. Atoms of an element that have the same mass number but have different atomic numbers.
  4. Atoms of an element that have the same atomic number but have different mass numbers.

Correct answer and explanation

Correct answer: Atoms of an element that have the same atomic number but have different mass numbers.