chapters 1-2
Anything that has mass and occupies space
Subatomic particle that has a positive charge and is found in the nucleus
Proton
Elements in the same vertical column of the periodic table are called this
Groups
In a balanced equation these numbers are placed in front of formulas
Coefficients
Percent yield equation
Actual yield divided by theoretical yield X 100
Formula used to calculate density
Mass divided by volume
The number of protons in an atom is known as this
The atomic number
These elements are the most likely to form ionic bonds
Metals and nonmetals
The symbol in a chemical equation means a substance is gas
(g)
What to do when you break glass
Tell Ms rose and sweep it up to put it in the broken glass box
Type of mixture that has a uniform composition throughout
Homogeneous mixture
Maximum number of electrons that can occupy the first energy level
2
Rule that states atoms tend to gain, lose, or share electrons to have 8 in their outer shell
Octet rule
The Roman numeral in iron(111) oxide tells you this
the charge of the iron ion
stoichiometry is based on this fundamental law of chemistry
Law of conservation of mass
Type of mixture that doesn’t have a uniform composition throughout
Heterogeneous mixture
Electrons that are involved in bonding in the outermost shell
Valence electrons
The most reactive group of non metals is known as?
Halogens
A chemical equation is balanced when this is conserved
Mass
What three things should you always get before you start your lab
Apron, goggles, and gloves
The ability of a substance to burn is classified as this type of property
Chemical property
Most of the atoms mass is concentrated in this part
Nucleus
What element is located in period 2 group 17 (need a periodic table for this one)
Fluorine
Balance the equation
H2+02-> H20
2H2+02 -> 2H20
Is the actual yield is 50g and the theoretical yield is 20g what is the percent yield
250g