ATOMS

Front

What is an atom?

Back

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

Front

What are the three main particles in an atom?

Back

Protons, neutrons, and electrons.

Front

What is the charge of protons?

Back

Protons have a positive charge.

Front

What is the charge of electrons?

Back

Electrons have a negative charge.

Front

What is the charge of neutrons?

Back

Neutrons have no charge (they are neutral).

Front

What does atomic mass represent?

Back

Atomic mass is the weighted average mass of an atom's isotopes, measured in atomic mass units (amu).

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

How are elements arranged in the modern periodic table?

Back

Elements are arranged by increasing atomic number.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.