CBSE Class 9 Chemistry Parameters of an Atom


Which of the following radioactive elements is used in radiotherapy to treat prostate cancer?


The mass number of helium is 4 and its atomic number is 2. What will be the number of neutrons present in the nucleus of helium atom?


What is the relation between Argon and Calcium?

Atomic Number and Mass Number - Exam Decoded

This video contains questions on atomic and mass numbers, isotopes and isobars.

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