The top number on the label of an element. It tells you the number of protons and electrons.
What is the atomic number?
100
These run up and down on the periodic table. Also called families, they have similar physical and chemical properties.
What are groups?
100
These apply to the entire compound. You MULTIPLY them with the subscripts. It tells you the number of molecules.
What are coefficients?
100
Identifies the elements that make up the compound. For example, O.
What is a symbol?
100
The first one holds 2 electrons, the 2nd one holds 3, and the 3rd holds 18.
What is the 1st, 2nd, and 3rd shell of an atom?
200
The center of an atom, where the protons and neutrons are located
What is the Nucleus?
200
Running from left to right, the horizontal rows on the periodic table.
Periods.
200
This number refers only to the atom that they are BEHIND. For example: h20
What is a subscript?
200
What you should write first, before you solve a chemical equation
What is RAP?
200
These may be a solid, liquid, or a gas. They are soft, dull, poor conductors but good insulators, and have low melting points.
What are non-metals?
300
Mostly empty space, it contains most of the volume of an atom, as well as electrons.
What is the electron cloud?
300
The most stable/non-reactive group. They have 8 valence electrons, are made up of all gases, are odorless and colorless, and do not react with any other elements.
What are the noble gases?
300
The mnemonic device used to remember the signs of a chemical reaction.
What is City Girls Love Their Cell Phones On?
300
Shows the directions of the reaction.
What is a yield sign?
300
The protons and neutrons added together, gives you_____.
What is the atomic mass?
400
Stands for Protons, Electrons, and Neutrons. Tells the charges and masses of subatomic particles.
What is PEN 101?
400
These are solid, hard, shiny, good conductors of head and electricity but poor INSULATORS, can be stretched into wires, and when mixed with water they will rust.
What are metals?
400
A substance the cannot be separated into a simpler substance and are organized on the periodic table.
What is an element?
400
The substances you begin with in a chemical reaction (left side of yield sign)
What are the reactants?
400
States thaqt the number of atoms for each element on the reactant side should be equal to the number of atoms on the product side of a chemical equation
What is the law of conservation of mass?
500
Tells us that Atomic#=Protons=Electrons, and the Mass# - Atomic# = Neutrons
What is APE MAN?
500
Have properties of both metals and non-metals.
What are metalloids?
500
Two or more elements chemically joined together.
What is a molecule?
500
Substances you end with in a chemical reaction (right side of yield sign)
What are products?
500
Bubbling (gas produced), color change, light, and temperature change.