Structure of Matter
This is the Smallest unit of Matter
What is an Atom?
This state of matter has a definite shape and volume.
What is a Solid?
This is one sign that a chemical reaction has occurred
What is/are: Gas bubbles, color change, temperature change, or new substance forms.
This law states that matter is not created or destroyed
What is the Law of Conservation of Mass?
This is what coefficients represent in a chemical equation
What is the number of molecules?
Two or more atoms once chemically bonded together
What is a Molecule?
This state of matter is where particles slide past each other
What is a Liquid?
These are considered to be reactants
What are the starting substances in a chemical reaction
During a chemical reaction, this is what happens to atoms
What is they are rearranged?
This is the only way you can change the number of molecules in order to balance an equation
What are coefficients
This is considered to be the difference between an element and a compound.
What is, an element has one type of atom; a compound has two or more different elements chemically combined.
This state of matter has particles that move freely and spread apart.
What is Gas?
This is the difference between a physical change and a chemical change
What is a physical change does not form a new substance; a chemical change does
This is why chemical equations should be balanced.
What is, to show conservation of mass?
What is 1 Carbon atom and 2 Oxygen atoms
This happens to particle motions as matter changes from solid to gas.
What is Particle motion increases.
Rusting is known to be this type of change, since a new substance forms.
What is a Chemical Change?
IF there are 6 oxygen atoms before a reaction, this is how many must remain, after
What are 6 Oxygen atoms?
They have the same elements but in different ratios, giving them different properties.
This is how energy affects changes in states of matter.
Adding energy increases particle motion; removing energy decreases particle motion.
A reaction produces heat and light and is known to be this __________, since it releases energy.
What is exothermic?
This is how a model can show conservation of mass in the form of a chemical equation.
What is the number of each type of atom is the same before and after the reaction