Counting Atoms

Front

What is a compound?

Back

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

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What does the chemical formula H2SO4 represent?

Back

H2SO4 represents sulfuric acid, which is a compound made of hydrogen, sulfur, and oxygen.

Front

How many atoms are in the chemical formula H2SO4?

Back

There are 7 atoms in total: 2 hydrogen (H), 1 sulfur (S), and 4 oxygen (O).

Front

What is the significance of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a compound.

Front

How many different elements are in NaHCO3?

Back

There are 4 different elements: sodium (Na), hydrogen (H), carbon (C), and oxygen (O).

Front

What is the total number of atoms in NaCl?

Back

There are 2 atoms in NaCl: 1 sodium (Na) and 1 chlorine (Cl).

Front

What does the formula H2 indicate?

Back

H2 indicates a molecule of hydrogen gas, consisting of 2 hydrogen atoms bonded together.

Front

How do you determine the number of atoms in a compound?

Back

Count the total number of atoms by adding the subscripts of each element in the chemical formula.

Front

What is the chemical formula for table salt?

Back

The chemical formula for table salt is NaCl.