My grandfather has traveled the world when he was young.

Hydrogen is the most abundant element in the universe.

He is learning the basics of mathematics.

I am planning to travel to Kiso next week.

Fluorine is an important element for dental health.

My computer is made of silicon.

Boron is one of the elements widely distributed in the earth's crust.

The ingredients for this dish are all locally sourced.

He is known as the founder of that religion.