Cosby Arrives At Court for Sex-Assault Case

The video provides a brief introduction to the concept of elements, setting the stage for further exploration of the topic.

What is the main topic introduced in the video?

• Elements

• Compounds

• Mixtures

• Reactions

Which of the following is a characteristic of elements?

• They are composed of different types of atoms.

• They are always in liquid form.

• They cannot be broken down into simpler substances.

• They are made of two or more substances.