Chemistry Flashcards
Atom
Smallest piece of an element that can enter into chemical combinations
Catalyst
substance that increases the rate of a chemical reaction without being consumed itself
Chemical Reaction
process in which one or more substances are converted into other substances
Covalent Bond
bond in which two electrons are shared by two atoms
Density
mass of a substance divided by its volume
Diffusion
the gradual mixing of one substance with another due to random molecular motion
Element
substance that cannot be separated into simpler substances by chemical means
Endothermic Process
process that absorbs heat from surroundings
Exothermic Process
process that gives off heat during a reaction
first law of thermodynamics
energy can be converted from one form to another but cannot be created nor destroyed
Thermal Energy
energy associated with the random motion of atoms and molecules
Ionic Bond
electrostatic force holding an ion together in an ionic compound
Isotopes
atoms having the same number of protons but different number of neutrons, affecting its atomic mass
Kinetic Energy
energy available due to motion of an object
Molecular Compound
compound consisting of covalently bonded atoms
