The Law of Conservation of Mass – during a ________ reaction, the mass (65) _______ the reaction must _______ the mass after the reaction. We show this by (66) writing and balancing a chemical _______. When we write a chemical equation, (67) we use the chemical _______ for the elements and _______ to indicate how (68) many atoms of each element are present in the reaction.
The Law of Conservation of Mass – during a chemical reaction, the mass (65) 'before' the reaction must (66) 'equal' the mass after the reaction. We show this by (66) writing and balancing a chemical equation. When we write a chemical equation, (67) we use the chemical symbols for the elements and (68) subscripts to indicate how many atoms of each element are present in the reaction.
______are the starting ______that react with each other to form new substances. (72) Products are the ______results of the ______reaction. Balanced equations have (73) ______number of atoms on both ______of the equation. This shows matter is (74) neither ______nor destroyed.
Reactants are the starting materials that react with each other to form new substances. (72) Products are the end results of the chemical reaction. Balanced equations have (73) an equal number of atoms on both sides of the equation. This shows matter is (74) neither created nor destroyed.
The ______is the number in ______of the element or ______. It indicates how (76) many of that ______are part of the reaction. If ______number is written, then the (line 77) 1 is a given (we wouldn’t write the ______if it was not there).
(78) The subscript is ______and slightly below the ______. It indicates how many (79) ______of that element are in the molecule. If no ______is written, then the 1 is a (80) given.
The subscript (75) is the number in lower case to the right of the element or molecule. It indicates how (76) many of that element or molecule are part of the reaction. If no (77) number is written, then the 1 is a given (we wouldn’t write the (line 78) subscript if it was not there).
The subscript (79) is smaller and slightly below the line. It indicates how many (80) atoms of that element are in the molecule. If no (81) subscript is written, then the 1 is a (82) given.