Matter Post Test Review

two or more atoms held together by covalent bonds

• molecule

• atom

• element

a substance made up of atoms of two or more different elements joined by chemical bonds

• molecule

• compound

• mixture

• solution

a process where the molecular structure of a substance changes

• chemical formula

• chemical equation

• chemical reaction

a combination of chemical symbols and numbers to represent a substance

• mathematical formula

• mathematical equation

• chemical formula

• chemical equation

a way to describe a chemical reaction using chemical formulas and other symbols

• mathematical formula

• mathematical equation

• chemical formula

• chemical equation

number after the atomic symbol in equations that tells us the number of atoms of that element in the molecule

• denominator

• coefficient

• numerator

• subscript

number in front of molecules in a chemical equation; tells the number of that molecule involved in the reaction

• denominator

• coefficient

• numerator

• subscript

a new material formed in a chemical reaction

• coefficient

• subscript

• reactant

• product

a substance that takes part in and undergoes change during a reaction

• coefficient

• subscript

• reactant

• product

If reaction starts with 20g of reactants it should produce... 

• a total of 40g of product
• a total of 10g of product
• a total of 80 g of product
• a total of 20g of product