Past Unit Review
The smallest bit of matter that cannot be broken down into smaller parts; composed of protons, neutrons, and electrons.
Atom
If an equation is balanced, will the products have more, less than, or the same amount of atoms as the reactants.
Same amount
The substances made in a chemical reaction; found on the right side of the arrow in a chemical equation.
Products
Does the total mass change in a chemical reaction?
No
The number of Periodic Table posters hanging up in Ms. Knickrehm's classroom.
4
When atoms of substances rearrange themselves into a new configuration.
Chemical reaction
If there are 4 atoms of hydrogen in the reactants, how many atoms of hydrogen will be in the products?
4
The substances that react to form a new substance in a chemical reaction; on the left side of the arrow in a chemical equation.
Reactants
The law that states that the total number of atoms of each element is not changed during a chemical reaction.
Law of Conservation of Mass/Matter
The first president of the United States.
George Washington
The measurement of how much matter is in an object.
Mass
In the equation H2 + O2 --> 2H2O, what coefficient needs to be in front of H2 to make the equation balanced?
2
The big number placed in front of a chemical symbol in a balanced equation.
Coefficient
To prevent the loss of something.
Conserve
The teacher whose classroom is next door to Ms. Knickrehm's class.
Ms. Addison
Two or more atoms bonded together.
Molecule
If you have the reactant 2Fe2O3, how many atoms of O do you need to have in the products?
6
The small number written below and to the right of a chemical symbol to show how many atoms are present.
Subscript
The law that states that matter is not created or destroyed.
Law of conservation of mass/matter
The name of the scientist on the closet door in Ms. Knickrehm's room.
Albert Einstein
Smallest pure substance composed of all the same type of atoms.
Element
If there are 15 grams of one reactant, and 13 grams of the other reactant, how many grams of product will there be?
28 grams
When the number of each reactant's atoms and the number of each product's atoms are equal, the chemical equation is called...
Balanced
How can we tell that mass is conserved in a reaction?
Measure mass of reactants, run equation in a closed container (like a bag), measure mass of the products.
Ms. Knickrehm's favorite singer.
Taylor Swift