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

The color of that entrance is mysterious, creating a mystical atmosphere.

He can speak many languages.

I am currently living in Tokyo.

What is the origin of this word?

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

The atomic number of helium is 2.

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

Hydrogen is the most abundant element in the universe.

Transition elements play an important role in chemical reactions.