Chemistry Flashcard Review 24

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together. It can be made up of the same or different elements.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is the difference between a molecule and a compound?

Back

A molecule can consist of the same type of atoms (like O2), while a compound consists of different types of atoms (like H2O).

Front

What are physical properties?

Back

Physical properties are characteristics of a substance that can be observed without changing its identity, such as color, odor, and melting point.

Front

What are chemical properties?

Back

Chemical properties describe how a substance interacts with other substances and how it changes into a different substance.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What is an example of a physical property?

Back

An example of a physical property is the boiling point of water, which is 100°C at sea level.

Front

What is an example of a chemical property?

Back

An example of a chemical property is the ability of iron to rust when exposed to oxygen and moisture.

Front

In which phase of matter are particles close together but can move freely?

Back

In the liquid phase, particles are close together but can move around each other.

Front

What is the state of matter where particles are tightly packed and vibrate in place?

Back

In the solid state, particles are tightly packed and can only vibrate in place.