Vocabulary
A process in which one or more substances are transformed into new substances with different chemical compositions and properties.
What is a chemical change? OR What is a chemical reaction?
Count the ATOMS in: C6H12O6
(please give the number of atoms for each element, AND the TOTAL number of atoms)
What is: 6 atoms of Carbon, 12 atoms of Hydrogen, 6 atoms of Oxygen, for a total of 24 atoms?
a substance to the left of the arrow in a chemical reaction
What is a reactant?
The smallest unit of an element that retains all of the properties
What is an atom?
When the number of atoms is equal on both sides of the equation, we say that this LAW has been fulfilled.
What is the LAW OF CONSERVATION OF MASS?
Count the number of ATOMS and the number of MOLECULES in: Fe2O3
What is: 2 atoms of Iron (Fe), 3 atoms of Oxygen (O).
1 Molecule
What does the arrow mean in 4Fe + 3O2 --> 2Fe2O3
What is yields?
These are found on the Periodic Table
What is an element?
is like a ‘recipe’ telling what happens during a chemical reaction.
What is a chemical equation?
Determine the number of atoms of each element AND the number of MOLECULES: 5H2SO4
What is: 10 atoms of Hydrogen, 5 atoms of Sulfur, and 20 atoms of Oxygen, for a total of 35 atoms, and there are 5 molecules.
a number placed in front of an element symbol or chemical formula in an equation
What is a coefficient?
A substance made of only one type of atom
What is an element?
Matter that is always made of the same combination of atoms
What is a substance?
Balance the following equation:
N2 + H2 -> NH3
N2 + 3H2 -> 2NH3
a small number to the bottom right of an element
What is a subscript?
Two or more different elements, chemically combined
What is a compound?
Explain the difference between homogeneous and heterogeneous
What is homogeneous is evenly distributed (the same all throughout), and heterogeneous is NOT evenly distributed
What do you call the "Letter(s)" that represent an element on the Periodic Table? (ex: Cl = Chlorine)
What is a chemical symbol? (You MUST include the word "symbol")
a substance to the right of the arrow in a chemical reaction
What is the product?
Explain the difference between a mixture and a compound.
What is all of the elements in a mixture keep their own properties because mixtures are physically combined, but compounds form new substances, and are chemically combined