Atomic Number and Mass Number

Front

What do all atoms of the same element have?

Back

Same number of protons.

Front

What is the mass number defined as?

Back

The number of protons and neutrons.

Front

What is the atomic number?

Back

The number of protons in an atom.

Front

What is the atomic mass of a nucleus with 3 protons and 4 neutrons?

Back

7.

Front

How does the atomic number relate to the identity of an element?

Back

It uniquely identifies the element.

Front

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

Back

They are equal in number.

Front

What is a nucleon?

Back

A particle in the nucleus, either a proton or a neutron.

Front

How do isotopes of an element differ?

Back

They have the same number of protons but different numbers of neutrons.

Front

What is the significance of the atomic mass unit (amu)?

Back

It is a standard unit for measuring atomic mass.

Front

What is the formula to calculate mass number?

Back

Mass number = Number of protons + Number of neutrons.