Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus made of protons and neutrons, surrounded by electrons.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together. Molecules can be made of the same or different elements.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together in a fixed ratio.

Front

How do you determine the number of elements in a chemical formula?

Back

Count the different chemical symbols in the formula. Each unique symbol represents a different element.

Front

What does the subscript in a chemical formula indicate?

Back

Front

What is the difference between an element and a compound?

Back

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

Front

What is the chemical formula for water?

Back

Front

Back

There are 24 atoms in total: 6 carbon (C), 12 hydrogen (H), and 6 oxygen (O) atoms.

Front

What is the chemical formula for a compound made of 1 nickel atom and 2 fluorine atoms?

Back

Front

Back