Isotopes

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 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

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

Back

Number of neutrons = Mass number - Atomic 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

Which subatomic particle has the smallest mass?

Back

Electron.

Front

What is the difference between carbon-12 and carbon-14?

Back

They have a different number of neutrons (carbon-12 has 6 neutrons, carbon-14 has 8 neutrons).

Front

If an element has an atomic number of 20 and a mass number of 46, how many neutrons does it have?

Back

26 neutrons.

Front

What is the symbol for calcium?

Back

Ca.

Front

How many protons does lithium-6 have?

Back

3 protons.

Front

What is the significance of isotopes in medicine?

Back

Isotopes are used in medical imaging and treatment, such as radioactive iodine in thyroid treatment.