CH 3 : WS1

Front

What is the mass number of an atom?

Back

The mass number of an atom is the sum of the protons and neutrons in the nucleus of that atom.

Front

What mass does a neutron have?

Back

A neutron has a mass of 1 amu.

Front

How many protons does an aluminum atom have?

Back

An aluminum atom has 13 protons.

Front

What does the atomic number of an element represent?

Back

The atomic number of an element equals the number of protons in an atom of that element.

Front

What is the total number of protons and neutrons in an atom called?

Back

The total number of protons and neutrons in an atom is called the mass number.

Front

Define atomic number.

Back

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

Front

What is the mass of a proton?

Back

A proton has a mass of 1 amu.

Front

What is the difference between mass number and atomic number?

Back

The mass number is the sum of protons and neutrons, while the atomic number is the number of protons.

Front

What is an isotope?

Back

An isotope is a variant of an element that has the same number of protons but a different number of neutrons.

Front

How do you calculate the mass number of an atom?

Back

The mass number is calculated by adding the number of protons and neutrons in the nucleus.