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Chem Chapter 2 Vocab (List A)

AB
NameDefinition
AcidpH < 7, Reacts w/ Metals, Neutralizes Acids, H+ > OH-
AdsorptionSpecific particles attracted and trapped on surface
AllotropesVersions of a single element with different properties by arrangement
AlloySolid solution of metals to get desired properties
AnionNegative Ion
AqueousWater Solution (Dissolved in Water)
AtomSmallest Unit of an Element
Atomic MassWeighted Average of all Common Isotopes
BasepH > 7, Does not React with Metals, Neutralizes Bases, OH- > H+
BrittleBreaks or shatters instead of bending
CationPositive Ion
CentrifugingSeparation by spinning rapidly. Based on Density. Liquids from Solids
ChromatographySeparation by particle attraction when being passed through a medium
ColloidStable microscopic mixture dispersed unevenly.
Compound2+ atoms chemically bonded together to form a pure substance
Covalent (Molecular) Compound2+ atoms bonded together by sharing valence electrons
CrystallizationRapid formation of a solid, may push out or trap other materials
DistillationSeparation by slow boiling liquids. Based on Boiling Points. Purification
DuctileAbility to be drawn into a continuous wire without snapping
ElectrolysisSeparation by running a current through a material. Chemical Change
ElectrolytesSubstance can conduct electrical current when dissolved/melted
ElectronNegative Particle with negligible mass that flies around the nucleus
Electron CloudArea where electron(s) are likely to be found
ElementPiece of matter that cannot be separated any more (118 of them)
FiltrationSeparation by particle size by being passed through somethin else
Formula UnitSmallest Unit of an Ionic Compound that retains its properties
GasPhase that has lots of space in between particles and low density
Heterogeneous MixtureUneven combination of 2+ unique substances
Homogeneous MixtureEven combination of 2+ unique substances
IonAtom with a charge
Ionic (Solution)Ions evenly dispersed throughout a medium by disassociation
Ionic Compound2+ atoms bonded together by attractive magnetic forces
IsotopeVersion of an atom with a specific number of neutrons
LiquidPhase with particles close together, but able to flow around each other
LustrousReflects light readily, aka shiny
MagnetismSeparation by attraction to a negative or positive external charge
MalleableAbility to be shaped easily without breaking
Mass NumberProtons + Neutrons of a specific isotope
MatterAnything with Mass and Volume
MetalShiny, Malleable, Ductile, Conductive, Mostly Solids & Cations
MetalloidHas some properties of both metals and nonmetals
Mixture2+ substances physically combined
MoleculeSmallest Unit of a Covalent Compound that retains its properties
Neutral (Solution)pH = 7, H+ = OH-
NeutronParticle (without charge) that holds protons together in the nucleus
Non-MetalDull, Brittle, Non-Conductive, Mostly Gases & Anions
NucleusDense positive core of an atom holds protons and neutrons
OrbitalRegion of space where up to 2 electrons can be found
Organic CompoundCarbon-based compound whose arrangement determines everything
ParticleSpecific piece of matter (typically very small)
ProtonPositive particle that determines the identity of an atom
Pure SubstanceMatter made of one type of particle. Cannot be physically separated
Separation (by Hand)Physically picking pieces out of a mixture
Shell (Energy Level)A large area of probability where electrons are likely to be found
SolidPhase with particles tightly packed into a set shape
SolutionAn even mix of one or more solutes in a solvent
Subatomic ParticleA piece of an atom (proton, neutron, electron)
Subshell (Block)A sub-division of a shell (s, p, d, f)
SuspensionA temporary mix of large particles that settle on standing
Valence ElectronsOutermost layer that determines all chemical reactions
Atomic NumberNumber of protons (determines the element)
CondensationPhysical change of state from Gas to Liquid
DepositionPhysical change of state from Gas to Solid
EvaporationPhysical change of state from Liquid to Gas
FreezingPhysical change of state from Liquid to Solid
MeltingPhysical change of state from Solid to Liquid
SettlingSubstances naturally separating by density over time
SoluteSubstance(s) dissolved within the solvent of a solution
SolventSubstance that does the dissolving in a solution
SublimationPhysical change of state from Solid to Gas
Tyndall EffectScattering of light by microscopic colloidal particles



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