Counting Atoms

Front

What is an atom?

Back

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

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in the molecule.

Front

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

Back

Identify each unique element symbol in the formula.

Front

In the formula H2O, how many hydrogen atoms are there?

Back

There are 2 hydrogen atoms.

Front

In the formula C6H12O6, how many total oxygen atoms are there?

Back

There are 6 oxygen atoms.

Front

What is the chemical formula for glucose?

Back

The chemical formula for glucose is C6H12O6.

Front

How many total atoms are in the molecule C2H5OH?

Back

There are 9 total atoms (2 Carbon, 6 Hydrogen, 1 Oxygen).

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.

Front

How many carbon atoms are in the formula 3C2H4?

Back

There are 6 carbon atoms.