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52 Cards in this Set

  • Front
  • Back
a region around the nucleous of an atom where electrons are most lickely to be found; only a certain no. of electrons can be found in each energy level of an atom
Energy Level
substance that contains only one kind of matter
the average mass of all the known isotopesof an element
Atomic Mass
a letter, figure, of other, charecter of mark used to desgnate something
the smallest particle of an element that can exist alone or combine with other elements
the smallest particle of a compound that retains the properties of the compound
a measure of a materials tendency to shatter upon impact
measure of a solid's ability to stretch and then return to it's original size
measure of a solid's resistance to scratching
solid's ability to be pounded into thin sheets
the process by which a substance in its gaseous state loses energy and enters it's liquid state
the process by which a substance in its gaseous state gains energy and enters its gaseous state
the curved uper surface of a non-turbulent liquid in a vertical tube
measure of the inertia of an object
principle- force exerted on an object in a liquid is=to the weight of the fluid displaced by the object
Archemedes Principle
measure of the upward force a fluid exerts on the object
a substance that is capable of flowing and that changes it's shape at a steady rate when acted upon by a force tending to change it's shape
a measure of a material's resistance to flow
an atom that has an electric charge
the attraction in an atom has for the shared pair of electrons in a chemical bond
a type of chemical bond that is formed when 2 atoms share electrons
Covalent Bond
a type of chemical bond between atoms that gain or lose electrons; a bond between ions
Ionic Bond
a bond between metalic atoms
Metal Bond
a covalent compound that consits of only 2 types of elements
Binary Compounds
the formula of a compound written in lowest terms
Empirical Fromula
a large molecule that is composed of repeating smaller molecules called subunits or monomers
a reaction in which one element replaces a similar element in a comound
Single Displacement
a reaction in which ions from 2 compunds in a solution exchange places to produce 2 new comounds
Double Displacement
a chemical reaction in which a single compound is broken down to produce 2 or more similar coompunds
Decomposition Reaction
a chemical reaction in which 2 or more substances combine to form a new compund
Addition Reaction/ Synthisis
a reaction in which a substance combines with oxygen releasing large amounts of energy in the form of heat and light
Combustion Reaction
the total mass of products of a reaction is = to the total nass of reactants
Law of Conservatin of Mass
(states that...)
a reactant that is used up first in the chemical reaction
Limiting Reactant
the no. of atoms in the atomic mass of an element or the no. of molecules in the formula mass of a compound when these masses are expressed
Avogadro's Number
one set of 6.02*10-23(power)atoms or molecules
a way of visually distinguishing coloids from true solutions
Tyndall Effect
a type of mixture in which the particles(atoms or molecules) are betweee 1.0and 1000nanometers in diameter
a unit of measurment that is = to 1 billinth of a meter
solutions of 2 or more metals
In physics- occurs when the forces on an object are balanced; in chemistry- the state in which the solute in a solution is dissolving and coming out of sloution at the same weight
a type of mixture in which the particles (atoms or molecules) are larger than 1000nanometers in diameter
a compound you can't pass an electric current through after dissolving
contributes ZHydrogen ions to a solution
contributes OH-(hydroxyle) ions to a solution
rain, snow, or fog that has a pH lower than 5.6
Acid Precipitation
exact concentration of H+ ions and OH- ions in a solution
chemicals that form ions and conduct current when dissolved in water
emmitted from the nucleus of an atom during radioactive decay, also called a Helium nucleus
Alpha Particle
the length of time it takes for 1/2's; an amount of radioactive substance to undergo radioactive decay
Half- Life
an electron emmited from the muscles of the atom during radioactive decay
Beta Particles
splitting of the nucleus of the atom
2 nuclei from 2 atoms combine to make a different atom