Atoms

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are the three main parts of an atom?

Back

The three main parts of an atom are protons, neutrons, and electrons.

Front

What is a proton?

Back

A proton is a positively charged particle found in the nucleus of an atom.

Front

What is a neutron?

Back

A neutron is a neutral particle found in the nucleus of an atom.

Front

What is an electron?

Back

An electron is a negatively charged particle that orbits the nucleus of an atom.

Front

What determines the identity of an element?

Back

The identity of an element is determined by the number of protons in its nucleus.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which defines the element.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed without changing its chemical composition.

Front

What is a chemical property?

Back

A chemical property is a characteristic of a substance that describes its ability to change into different substances.

Front

What is the freezing point of water?

Back

The freezing point of water is 0 degrees Celsius (32 degrees Fahrenheit), and it is a physical property.