Hydra is one of the largest constellations in astronomy.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

He is the type of person who understands ten from hearing one.

We went for a picnic to the lake on the weekend.

We had a picnic at the lake over the weekend.

Technetium is one of the most unstable elements in the periodic table.

Where is holmium located in the periodic table?

We will use cadmium in this chemical experiment.

Polonium is one of the radioactive elements.

Scandium is a rare element that exists in very small amounts in the earth's crust.