Classifying Matter
Elements, Compounds, and Mixtures
Atomic Models
Physical and Chemical Changes
Balancing Equations
100
A small particle that is the building block of matter
What is an atom?
100
A substance made of only one kind of atom
What is an element?
100
The subatomic molecules found in the nucleus of the atom.
What are protons and neutrons?
100
Baking brownies, baking pizza crust, and dying your hair are examples of this.
What are chemical changes?
100
NAC2H3O2, H2O, and CO2 are examples of this.
What are reactants?
200
Matter with a composition that is always the same
What is a substance?
200
A mixture where the substances are NOT evenly mixed
What is a heterogenous mixture?
200
These two things make up the atomic mass of an atom.
What are protons and neutrons?
200
Ice melting, cutting pepperoni, and ripping paper are examples of this.
What are physical changes?
200
C2H4O2, NAHCO3 are examples of this
What are reactants?
300
Two or more atoms that are held together by chemical bonds and act as a unit
What is a molecule?
300
SO3 contains _______ sulfur and _______ oxygen.
What is 1 sulfur and 3 oxygen?
300
Draw the atomic model of Sodium.
300
A chemical change is either associated with compounds or mixtures.
What is a compound?
300
Find the mass of the reactants.
80 g
400
Many singular molecules that bonded together
What is an element?
400
A mixture where substances are EVENLY mixed, can also be called a solution
Homogenous mixture
400
Draw the atomic model of Oxygen.
400
Three signs of a chemical reaction.
What is
400
Find the mass of the products. 
54 g
500
What is a diatomic molecule?
500
The smallest part of the element that still maintains the characteristics of that element.
What is an atom?
500
Why are electrons not included in atomic mass?
Electrons move too quickly
Electrons are too small
500
This happens to atoms during chemical changes.
What are atoms rearranging? / What are the rearranging of atoms?
500
In this system, the mass does not change.
What is a closed system?