Atomic Structure

Front

What is the atomic number?

Back

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

Front

What determines the identity of an element?

Back

The identity of an element is determined by the number of protons it has.

Front

What does the letter 'C' represent in chemistry?

Back

The letter 'C' represents the chemical symbol for the element Carbon.

Front

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

Back

The number of neutrons can be calculated by subtracting the atomic number from the mass number.

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

If an atom has 10 protons and 15 neutrons, what is its mass number?

Back

The mass number is 25 (10 protons + 15 neutrons).

Front

What is a proton?

Back

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

Front

What is a neutron?

Back

A neutron is a neutral particle found in the nucleus of an atom.

Front

What is an electron?

Back

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

Front

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

Back

In a neutral atom, the number of protons equals the number of electrons.