Please add a little vinegar to this salad.

We cannot live without oxygen.

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

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.

My friend lives in Arkansas.

He has the spirit of mutual concession.

You can put out oversized garbage every first Saturday of the month.

I love histology classes.