A2 Chemistry Comp Review Sheet
Terms in this set (67)
What is the rule for multiplying and dividing, and adding and subtracting numbers?
Round go ghe smallest decimal
What Numbers can be coefficients in scientific notation
All #s greater that 1
What is the rule when recording measurements?
If 1.5 rm round to 1.50 rm
Convert 255 grams to pounds
255g x 1lb/453.6g = .562
What is absolute zero?
Is the kelvin temperature where matter stops 0 K all molecular motion cases
When a rock is placed in a graduated cylinder the water level rises from 10 mL to 25 mL what is the volume of the rock?
Two units of energy
Joule & calorie
What is the percent error formula
A pure substance made up of two or more elements that are chemically combined
Had a definite shape and definite volume
Does not have a definite shape by has a definite volume
Does not have a definite shape nor definite volume
Combination of two or more substances that are physically combined
A mixture that appears to have a uniform composition
A mixture that does not have a uniform position
Matter that has no uniform and definite composition
Properties that describe the substance itself not how it reacts with something else
Change that does not alter the identity of a substance
D3scribes how a substance can react with another substance
Changing the identity and properties of a substance
Relates an objects mass to its volume
A method to separate a solid and liquid
discovered the electron
Coined the term atom, Greek philosopher
Was credited for the periodic law, he placed the in order form increasing atomic mass
Is equal to the number of proton in an atom
The weighted average mass of all naturally occurring isotopes of an element
Equal to the protons plus the neutrons in an atom
JJ Thompson discovered them, located outside of an atom, have a negative one charge. There mass is negligible. Involved in chemical reactions and bonding
Location is Nucleus of an atom, they have a positive one charge. Have a mass of one amu. They determine the identity of the atom.
Location is Nucleus of an atom. They have a positive one charge. Have a mass of one amu. They determine the identity of the atom
Located in the nucleus of an atom. They have a mass of one amu. They have no charge
principal quantum numbers
Main energy level an electron can be found in.
Sub levels s,p,d,f each number has different sub levels, each sub level has a different number of orbitals
Level 1 has s, Level 2 has s and p, Level 3 has spd, Level 4 and higher has spdf
States that electrons will occupy orbitals with the lowest energy then going to the highest
Pauli Exclusion Principle
2 electrons can occupy an orbital but they must have opposite spins.
Single electrons with the same spin must occupy each equal energy orbitals before electrons with an opposite spin are added
The distance between two corresponding points on a wave
Number of waves that pass a given point each second. Measured in Herts (H2)
Dalton's Atomic Theory
All matter is made up of atoms, atoms cannot de subdivided. All atoms of the same element are identical to each other but different then other elements
Electrons found in outer most energy level of an atom
How is the periodic table arranged?
increasing atomic #
What charge will ions in groups 1,2,13,15,16 and 17 make?
Greater than 1.7=Ionic, Between 0.4 & 1.7 = polar covalent, Less than 0.4=Non-Polar Covalent
What type of radiation can only be stopped by thick lead lead or concrete?
What type of radio active particle is known as a high energy electron
What is a reducing agent?
The # being oxidized
What happens to an oxidation number during oxidation?
Gains oxygen & looses electrons
What are the names of groups 1,2,3-12, 17 and 18?
Alkaline=1,Earth Metals=2,Transitional Elements=13,Halogens=15, Noble Gases=16
is the maximum amount of product that could be formed from the given amounts of reactants
The amount of product that is actually formed when the reaction is carried out of the laboratory
A measurement of how successful an experiment was
freezing point depression
The difference in temperature between the freezing point of pure solvent and freezing point of the solvents solution
boiling point elevation
Is the difference in temperature between the boiling point of the pure solvent and that of the solution
Is the amount of energy needed to raise the temperature of 1g of water by 1 c
The amount of heat required to raise a substance by 1 degree C
The actual amount of heat that raises the temperature of 1g Of a substance by 1 degree C
The heat of a system at constant pressure
Used to measure heat transfer and can be made with a coffee cup, water, and a thermometer
What a chemical bond breaks,cathedral reaction is always______
When chemical bonds are formed, Heat is released in a ___________ reaction
Contains one or more benzene rings
If they ionize completely in water, they are strong acids. They have a sour taste. Turn blue litmus paper red. React with metals to produce hydrogen gas. They conduct electricity
Can be strong or weak, bitter and slippery. Turns red litmus paper blue and turns phenolphthalein pink. Don't react with metals
Solution is the number of moles of solute dissolved in one liter of solution
One of multiple molecules that have same molecular formula
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