Atomic Number and Mass Concepts

Front

What is the atomic number?

Back

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

Front

What is the atomic mass primarily determined by?

Back

The atomic mass is primarily determined by the number of protons and neutrons combined.

Front

What is the atomic number of Helium (He)?

Back

The atomic number of He is 2.

Front

What does the atomic mass unit (amu) measure?

Back

The atomic mass unit (amu) measures the mass of an atom.

Front

What is the relationship between protons and atomic number?

Back

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

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 an atom.

Front

What is the difference between atomic number and mass number?

Back

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

Front

What is an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the significance of the periodic table in relation to atomic number?

Back

Elements in the periodic table are arranged by increasing atomic number.

Front

What is a neutron?

Back

A neutron is a subatomic particle found in the nucleus of an atom, with no electric charge.