Atomic Structure

Front

What is the charge of protons in an atom?

Back

Protons have a positive charge.

Front

How many electrons are needed for an atom with 12 protons to be neutral?

Back

12 electrons.

Front

What is the definition of atomic number?

Back

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

Front

What does the chemical symbol represent in chemistry?

Back

The chemical symbol represents a specific element.

Front

What are the three main types of subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What is the mass number of an atom?

Back

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

Front

If an atom has a mass number of 11 and an atomic number of 5, how many neutrons does it have?

Back

6 neutrons.

Front

What is the charge of electrons in an atom?

Back

Electrons have a negative charge.

Front

What is the relationship between atomic number and the identity of an element?

Back

The atomic number determines the identity of an element.

Front

What is the significance of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and stabilize the nucleus.