Counting Protons, Neutrons, Electrons

Front

What is the mass number of tritium?

Back

3

Front

What is the mass number of carbon-13?

Back

13

Front

What is the mass number of carbon-14?

Back

14

Front

Isotopes of an element have different numbers of...

Back

neutrons

Front

How many electrons does a neutral atom of boron have?

Back

5

Front

Define mass number.

Back

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

Front

What is the relationship between protons and electrons in a neutral atom?

Back

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

Front

What are isotopes?

Back

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

Front

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

Back

Number of neutrons = Mass number - Number of protons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.