chemistry- subatomic particles

Front

What is the definition of an atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

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

Where is most of an atom's mass located?

Back

Most of an atom's mass is found in the nucleus.

Front

What is a proton?

Back

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

Front

What is a neutron?

Back

A neutron is a neutrally charged subatomic particle found in the nucleus of an atom.

Front

What is an electron?

Back

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

Front

How do you calculate the mass number of an atom?

Back

The mass number is calculated by adding the number of protons and neutrons in the nucleus.

Front

What is an isotope?

Back

An isotope is a variant of an element that has the same number of protons but a different number of neutrons.

Front

How many protons does a carbon atom have?

Back

A carbon atom has 6 protons.

Front

What is the charge of a neutron?

Back

A neutron has no charge; it is neutral.