Chemical Equations
Conservation of Mass
Energy in Chemical Reactions
100

blank are the substances that exist before the reaction.

What is reactants

100

Lavoisier used blank and blank to figure out the principle of conservation of mass

logic and scientific methods

100

Blank absorbs thermal energy

endothermic reactions

200

blank are the results of the reaction.

what is products

200

blank, a tool of measurement that was in figure 4 in the book on page 496

what is a scale

200

release thermal energy

exothermic reactions

300

blank tells chemists at a glance the reactants, products, and proportions of each substance present.

what is a chemical equation

300

If you have three hydrogen atoms and four nitrogen atoms, you will have blank hydrogen atoms and blank nitrogen atoms left after the reaction

what is three hydrogen atoms and four nitrogen atoms.

300

Bonds blank and blank when atoms gain, lose, or share electrons.

what is Break and form

400

The reactants Iron, Oxygen, and Water create this.

what is rust.

400

blank to blank is the time in which Antoine Lavoisier lived.

what is 1743 to 1794.

400

Some material also combine with oxygen but release thermal energy blank

what is slowly

500

 are the names of the reactants of the baking soda and vinegar reaction.

what is sodium hydrogen carbonate and acetic acid.

500

who first stated the principle of conservation of mass

who is Antoine Lavoisier

500

Often written in equations as either a reactant or a product

what is energy