Definitions
Material which slows down or stops the flow of either heat or electricity
Insulators
Movement of electric charge, usually electrons
Electricity
What are 4 indicators of chemical changes?
Fire (increase in heat). formation of a precipitate, Gas (bubbles, fizz, smoke), color change
It takes ___ to separate atoms that are bonded together.
Energy
Electrons; Protons
Material that allows electrons to flow easily through them
Conductors
"s" symbol in a chemical question
Solid
All compounds have an electrical charge of ___.
zero
Most pure elements are ____ at room temperature.
Solid
What holds the nucleus together?
Strong Nuclear Force
Average mass of any element in amu
Atomic Mass
"l" symbol in a chemical question
liquid
____ indicates the charge on the atom (or ion) when electrons are lost, gained, or shared in chemical bonds.
Oxidation Number
The periodic table is organized in order of __________.
Increasing Atomic Number
Positive; Negative (Protons; Electons)
Solid Mixture of one or more elements
Alloy
"g" symbol in a chemical question
gas
Reactive means an element readily forms ___ bonds, often releasing ___.
Chemical Bonds; Energy
Radioactive elements have an ____ nucleus
Unstable
What is Newton's First Law?
An object in motion stays in motion unless acted upon by an outside force. An object at rest will stay at rest unless acted upon by an outside force.
Properties repeat each period of the periodic table
Periodicity
"aq" symbol in a chemical question and what does that word mean
What are valence electrons?
Electrons on the outer level that DO the bonding
What are the 3 particles of an atom? Their location? Size? Charge?
Proton - positive, in nucleus, massive
Neutron - No charge, in nucleus, massive
Electron - negative, outside nucleus, tiny
What is Newton's Third Law?
For every action there is and equal and opposite reaction.