Atomic structure

Front

What is an electron?

Back

An electron is a subatomic particle with a negative charge and a mass smaller than that of a proton.

Front

Where is a proton found in an atom?

Back

A proton is found in the nucleus of an atom and has a positive charge.

Front

What is the charge of a proton?

Back

The charge of a proton is +1.

Front

What is the atomic number of an element?

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 is a neutron?

Back

A neutron is a subatomic particle found in the nucleus of an atom that has no charge (neutral).

Front

What is the mass number of an atom?

Back

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

Front

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

Back

To find the number of neutrons, subtract the atomic number from the mass number.

Front

What is the relationship between atomic number and number of protons?

Back

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

Front

What is silicon's atomic number?

Back

Silicon has an atomic number of 14.

Front

What is the charge of an electron?

Back

The charge of an electron is -1.