When that character suddenly appeared, the story instantly became exciting.

I am currently living in Tokyo.

What is the origin of this word?

He is majoring in linguistics.

The atomic number of helium is 2.

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.

Hydrogen is the most abundant element in the universe.

Transition elements play an important role in chemical reactions.

He can speak many languages.