Question

Isotopes are those atoms having same atomic number but different mass number. Which of the following is NOT the property of isotopes?

• A. They have same atomic number.
• B. They have same chemical properties.
• C. They have same physical properties.
• D. They have same position in the periodic table

Answer 1

The correct option is C They have same physical properties.

Isotopes have same atomic number and thus same number of electrons which means they have same chemical properties.

Isotopes of an element differ in their physical properties like density, melting point, boiling point, etc. as they have different masses.