Atomic Number and Mass Number

Front

What is the mass number of an atom?

Back

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

Front

What is the atomic number of an atom?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What particle did James Chadwick discover?

Back

James Chadwick discovered the neutron.

Front

How do you calculate the mass number of an atom?

Back

Mass number = Number of protons + Number of neutrons.

Front

What is the relationship between atomic number and mass number?

Back

The atomic number identifies the element, while the mass number indicates the total number of protons and neutrons.

Front

What is the charge of a neutron?

Back

Neutrons have no charge; they are neutral particles.

Front

What is the charge of a proton?

Back

Protons have a positive charge.

Front

What is the charge of an electron?

Back

Electrons have a negative charge.

Front

How do isotopes of an element differ?

Back

Isotopes of an element have the same number of protons but different numbers of neutrons.

Front

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

Back

The atomic number determines the position of an element in the periodic table and its chemical properties.