Periodic Table 1

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which also equals the number of electrons in a neutral atom.

Front

What does the mass number represent?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What are protons?

Back

Protons are subatomic particles with a positive charge found in the nucleus of an atom.

Front

What are electrons?

Back

Electrons are subatomic particles with a negative charge that orbit the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are subatomic particles with no charge (neutral) found in the nucleus of an atom.

Front

What is the Periodic Table?

Back

The Periodic Table is an arrangement of elements organized by increasing atomic number.

Front

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

Back

The number of protons in an atom is equal to its atomic number.

Front

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

Back

In a neutral atom, the number of electrons is equal to the number of protons, which is the atomic number.

Front

What is an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge.