U2 Parts of an Atom

Front

What happens if the number of protons in an atom is changed?

Back

You cannot change the number of protons.

Front

What does the atomic number of an element indicate?

Back

The atomic number indicates the number of protons in an atom.

Front

What is an ion?

Back

An ion is an atom that has gained or lost electrons.

Front

What defines an isotope?

Back

An isotope is an atom with the same number of protons but a different number of neutrons.

Front

How is the periodic table organized?

Back

The periodic table is organized by atomic number.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

How do you determine the number of neutrons in an atom?

Back

Subtract the atomic number from the atomic mass.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.