He is an expert in chemistry.

An isotope refers to elements with the same atomic number but different numbers of neutrons.

Rare earth elements are essential materials for the manufacture of electronic devices.

Transition elements play an important role in chemical reactions.

A composite number, unlike a prime number, is represented by the product of two or more natural numbers.

I do laundry using synthetic detergent.

This new compound word is popular among young people.

He and his twin brother are as alike as two peas in a pod.

He and his brother are as alike as two peas in a pod.

He has the alias 'Genius' because of his talent.