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, resulting in different atomic masses.

Tags

NGSS.HS-PS1-8

Front

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

Back

To calculate the number of neutrons in an isotope, subtract the atomic number (number of protons) from the atomic mass.

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 does the number after the isotope name represent?

Back

The number after the isotope name represents the atomic mass of that isotope.

Front

If an element has an atomic number of 19 and an atomic mass of 39, how many neutrons does it have?

Back

It has 20 neutrons (39 - 19 = 20).

Front

What is the atomic mass of Nitrogen-14?

Back

The atomic mass of Nitrogen-14 is 14.

Tags

NGSS.HS-PS1-8

Front

How many neutrons are in Argon-40?

Back

Argon-40 has 22 neutrons (40 - 18 = 22).

Tags

NGSS.HS-PS1-8

Front

What is the atomic mass of Hydrogen?

Back

The atomic mass of Hydrogen is 1.

Front

How many neutrons are in Hydrogen-1?

Back

Hydrogen-1 has 0 neutrons (1 - 1 = 0).

Front

What is the significance of isotopes in chemistry?

Back

Isotopes are significant in chemistry for understanding nuclear reactions, dating materials, and medical applications.

Tags

NGSS.HS-PS1-8