Elements and Atoms

Front

What is the definition of an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are the three main subatomic particles in an atom?

Back

Protons, neutrons, and electrons.

Front

What is the charge of protons?

Back

Positive.

Front

What is the charge of neutrons?

Back

Neutral.

Front

What is the charge of electrons?

Back

Negative.

Front

What is the atomic number of an element?

Back

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

Front

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

Back

Subtract the atomic number from the atomic mass.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number and properties.

Front

What element has the atomic number 10?

Back

Neon (Ne).

Front

What is the mass number of an atom?

Back

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