Atomic Structure

Front

Which particles make up the nucleus of an atom?

Back

Protons and neutrons.

Front

What is matter that cannot be broken down into a simpler substance?

Back

An atom.

Front

What charge does the nucleus have and why?

Back

Positive - the neutrons do not have a charge.

Front

An atom has 13 protons, 15 neutrons and ___ electrons. What is its mass number?

Back

28.

Front

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

Back

6.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral.