Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/48

Click to flip

48 Cards in this Set

  • Front
  • Back
anything that occupies space
Matter
The quantity of matter an object has
Mass
The simplest particle of an element
Atom
The central core of an atom
Nucleus
positive electrical charge
Proton
has no electrical charge
Neutron
the number of protons in an atom
Atomic Number
negarively charged particles
Electrons
combining in way that cause their atoms to become stable
Chemical Reactions
a pure substance that is made up of atoms of two or more elments
Compound
attachments
Bonds
forms when two atoms share one or more pairs of electrons
Covalent bond
the simplest part of a substance that retains all of the properties of the substance and that can exist in a free state
Molecule
an atom or molecule with an electrical charge
Ion
when postive and negative electrical charges attract each other
Ionic Bond
the ability to do work or cause change
energy
the enery in a system that is available for work
free energy
a compound or action invloved in a chemical reaction
reactant
a compound formed from a chemical reaction
products
involve a net release of free energy
exergonic reactions
involve a net absoption of free energy
endergonic reactions
the amount of enery needed to start the reaction
activation energy
reduces the amount of activation energy that is needed for a reaction
catalysts
an important class of catalysts in living things
enzymes
the reaction in where electrons are transferred between atoms
redox reactions
a reactant loses one or more electrons becoming more positively charged
oxidation reaction
a reactant gains one or more electrons becoming more negativley charged
reduction reaction
where one or more substances are uniformly distributed in another substance
solution
is the substance dissolved in the solution
solute
the substance in which the solvent is dissloved
solvent
is the substance in which the solute is dissolved
solvent
the measurment of the amount of solute dissolved in a fixed amount of the solution
concentration
is one in which no more solute can dissolve
saturated solution
solutions in which water is the solvent
aqueous solutions
the breaking apart of water molecule into two ions of opposite charge
dissociation
the number of hydronium ions in a solution is greater than the number of hydroxide ions
acid
the solution that contains more hydroxide ions than hydronium ions
base
comparison of relative concentrations of hydronium ions and hydroxide ions
pH scale
are chemical substances that neutralize small amounts of either an acid or a base added to a solution
buffers
is the atom number of protons plus the number of neutons in the nucleus of the atom
mass number
different varities of the same atom
isotopes
is the breakdown of unstable isotope to an isotope of another element with the relase of radiation
radioactivity
contains carbon and hydrogen
organic compound
those compounds that do not contain carbon or hydrogen
inorganic compound
a physical rather than chemical association of substances
mixture
a homogeneous mixture of two or more substances in which one substances dissolves in another one (transparent)
solution
a mixture in which particles larger than those in a solution are suspended in another medium (cloudy)
suspension
shares some characteristics of solutions and suspensions the particles are larger. the particles do not settle out
colloid