Atomic Structure Test Review

Front

What are protons?

Back

Protons are positively charged subatomic particles found in the nucleus of an atom. They determine the atomic number and identity of an element.

Front

What is the atomic number?

Back

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

Front

What is the mass number?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What is the charge of an electron?

Back

Electrons have a negative charge.

Front

How many protons are in Aluminium?

Back

Aluminium has 13 protons.

Front

What is the mass of a neutron?

Back

The mass of a neutron is approximately 1 amu (atomic mass unit).

Front

What is the mass of an electron?

Back

The mass of an electron is approximately 0.00054 amu.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus of an atom and contribute to the mass number.

Front

What is the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while mass number is the total number of protons and neutrons in a specific isotope.