Counting Atoms

Front

What are molecules made of more than one type of atom called?

Back

Compounds

Front

Back

Water, consisting of 2 hydrogen atoms and 1 oxygen atom.

Front

How many elements are there in the periodic table?

Back

There are 118 known elements.

Front

What does the subscript in a chemical formula indicate?

Back

It indicates how many atoms of an element are present in a molecule.

Front

How many elements are in the chemical formula HCl?

Back

2 (Hydrogen and Chlorine).

Front

What is a molecule?

Back

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

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.

Front

What is the chemical formula for carbon dioxide?

Back

Front

What is the significance of the coefficient in a chemical formula?

Back

It indicates the number of molecules present.

Front

What is the chemical formula for table salt?

Back