Mass Number

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 does the atomic number represent?

Back

The atomic number represents the number of protons in the nucleus of an atom and determines the element's identity.

Front

How do isotopes of an element differ from each other?

Back

Isotopes of an element have the same number of protons but different numbers of neutrons.

Front

What is the mass number of Protium, the lightest isotope of Hydrogen?

Back

Protium has a mass number of 1, as it has 1 proton and 0 neutrons.

Front

What is the mass number of Deuterium, an isotope of Hydrogen?

Back

Deuterium has a mass number of 2, as it has 1 proton and 1 neutron.

Front

What is the mass number of Tritium, an isotope of Hydrogen?

Back

Tritium has a mass number of 3, as it has 1 proton and 2 neutrons.

Front

If an atom has 9 protons and 10 neutrons, what is its mass number?

Back

The mass number is 19 (9 protons + 10 neutrons).

Front

What is the relationship between mass number and the number of subatomic particles?

Back

The mass number is equal to the total number of protons and neutrons, which are the subatomic particles in the nucleus.

Front

What is the mass number of a nitrogen atom with 8 neutrons?

Back

The mass number is 15 (7 protons + 8 neutrons).

Front

What is true about Scandium-45?

Back

Scandium-45 has a mass number of 45, which includes both protons and neutrons.