Atomic Structure & History

Front

What is the atomic number of Lithium?

Back

3 (It represents the number of protons in an atom of Lithium.)

Front

What did Rutherford's gold foil experiment conclude about the atom?

Back

The atom is mostly empty space, has a small dense nucleus, and the nucleus is positively charged.

Front

What is the charge of a neutron?

Back

Neutrons are neutral; they have no charge.

Front

What must be true for an atom to be electrically neutral?

Back

It must contain the same number of protons and electrons.

Front

What are the three main subatomic particles?

Back

Protons, Neutrons, and Electrons.

Front

Where are protons located in an atom?

Back

In the nucleus.

Front

What is the mass of a proton compared to a neutron?

Back

Protons and neutrons have approximately the same mass.

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and determine the atom's charge.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

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

Back

Subtract the atomic number from the atomic mass.