Atoms and the Periodic Table

Front

What identifies an element?

Back

An element is identified by its number of protons.

Front

What is the symbol for Krypton?

Back

The symbol for Krypton is Kr.

Front

What is the subatomic particle labeled 'C'?

Back

The subatomic particle labeled 'C' is a proton.

Front

How many protons does the element with atomic number 7 have?

Back

The element with atomic number 7 has 7 protons.

Front

What charge does an electron have?

Back

An electron has a negative charge.

Front

What is the atomic number of an element?

Back

The atomic number of an element is the number of protons in its nucleus.

Front

What are isotopes?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is a neutron?

Back

A neutron is a subatomic particle found in the nucleus of an atom, with no charge.

Front

What is a proton?

Back

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