Atomic Structure

Front

What are the negatively charged particles that float around the outside of the atom?

Back

Electrons are the negatively charged particles that orbit the nucleus of an atom.

Front

What causes the mass of the nucleus to increase?

Back

Adding a neutron increases the mass of the nucleus.

Front

What is the atomic number of an atom with 3 protons?

Back

The atomic number is 3, which indicates the number of protons in the nucleus.

Front

Which particle determines the identity of an element?

Back

The proton determines the identity of an element.

Front

If an atom has 13 protons and 15 neutrons, what is its mass number?

Back

The mass number is 28, calculated as the sum of protons and neutrons (13 + 15).

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (it is neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

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 the role of electrons in chemical bonding?

Back

Electrons, particularly valence electrons, are involved in forming chemical bonds between atoms.