Atomic Structure and Isotopes

Front

What do all atoms of the same element have in common?

Back

They have the same number of protons.

Front

Which radioisotope is commonly used in medicine to treat thyroid disorders?

Back

Iodine-131.

Front

What is the atomic number of an atom?

Back

The atomic number is the number of protons in the nucleus of an atom.

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

What distinguishes isotopes of an element?

Back

Isotopes of an element have a different number of neutrons.

Front

Define 'proton'.

Back

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

Front

Define 'neutron'.

Back

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

Front

Define 'electron'.

Back

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

Front

What is the relationship between atomic number and element identity?

Back

The atomic number determines the identity of an element.

Front

How do you calculate the mass number of an atom?

Back

Mass number = Number of protons + Number of neutrons.