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, resulting in different mass numbers.

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

How do you determine the number of neutrons in an isotope?

Back

Subtract the number of protons (atomic number) from the mass number.

Front

What is the atomic number of an element?

Back

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

Front

What is the relationship between isotopes and chemical properties?

Back

Isotopes of the same element have the same chemical properties because they have the same number of protons and electrons.

Front

How many protons are in Beryllium-9?

Back

Beryllium has an atomic number of 4, so Beryllium-9 has 4 protons.

Front

What is the mass number of Fluorine-20?

Back

The mass number of Fluorine-20 is 20, which includes 9 protons and 11 neutrons.

Front

Which subatomic particle does not change in isotopes of the same element?

Back

The number of protons remains the same in isotopes of the same element.

Front

How many electrons are in a neutral atom of an isotope?

Back

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

Front

What is the significance of the term 'average atomic mass'?

Back

Average atomic mass is the weighted average of the masses of an element's isotopes, reflecting their natural abundance.