Counting Atoms

Front

In the equation, 2Mg + O₂ ---> 2MgO, which are the reactants?

Back

Mg and O

Front

In a chemical equation, elements or compounds that are produced and are located on the right side are called...

Back

products

Front

What is the little number after an element in a chemical equation called? Example: H₂

Back

Subscript

Front

What tells us the number of molecules present in an equation? Options: coefficient, subscripts, elements

Back

coefficient

Front

How many Nitrogen (N) atoms are in 4NH₃?

Back

4

Front

How many Hydrogen (H) atoms are in 4NH₃?

Back

12

Front

How many total molecules is 4NH₃?

Back

4

Front

In the equation shown, what are the reactant(s)?

Back

N₂ + H₂

Front

In the equation shown, what are the product(s)?

Back

NH₃

Front

Which of the following is a chemical reaction?

• Sodium and chlorine atoms bond to form salt molecules.
• Ice melts to form water.
• Carbon dioxide freezes to form dry ice.
• Salt and water mix to form salt water.

Back

Sodium and chlorine atoms bond to form salt molecules.