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

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

Back

Number of neutrons = Mass number - Atomic number.

Front

What is the atomic number of an element?

Back

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

Front

What does it mean if an atom is neutral?

Back

An atom is neutral if it has an equal number of protons and electrons.

Front

What particle determines the electrical charge of an atom?

Back

The electron determines the electrical charge of an atom.

Front

What is the significance of the periodic table in chemistry?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

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 role of protons in an atom?

Back

Protons determine the atomic number and identity of an element.

Front

What is the difference between mass number and atomic weight?

Back

Mass number is the total number of protons and neutrons, while atomic weight is the average mass of an element's isotopes.

Front

How many protons does an atom with atomic number 7 have?

Back

An atom with atomic number 7 has 7 protons.