PSAE Chemistry Review The study of matter and energy.

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Presentation transcript:

PSAE Chemistry Review The study of matter and energy

PSAE Chemistry Review Matter  Anything with mass and volume Energy  Ability to cause change or do work

PSAE Chemistry Review The atom  Basic unit of matter  Made of smaller particles  Electrons orbit the nucleus due to electrostatic charges

PSAE Chemistry Review Three Subatomic Particles ParticleChargeMass (amu) Location Proton (p + )+11.0Nucleus Neutron (n)01.0Nucleus Electron (e - ).00055Electron Cloud around Nucleus

PSAE Chemistry Review Element  A pure sample of matter containing only one type of atom Compound  More than one type of atom chemically bonded together Mixture  More than one type of atom in the same space but not bonded together

PSAE Chemistry Review Physical change  Change in state without changing the chemical formula. Always involves absorbing or emitting energy  Solid  Liquid  Gas  Plasma Chemical Change  A change in the chemical formula of a compound  Changes the properties of the chemicals involved 2 KI (aq) + Pb(NO 3 ) 2 (aq)  2 KNO 3 (aq) + PbI 2 (s)

PSAE Chemistry Review Periodic Table of the Elements

PSAE Chemistry Review 48 Cd Cadmium

PSAE Chemistry Review Metals to left Metalloids in purple Nonmetals to right Rare Earth Metals at bottom Group 1: Alkali metals Group 2: Alkaline Earth Metals Groups 3-12: Transition metals Group 17: Halogens Group 18: Nobel gases

PSAE Chemistry Review Periodic trends PropertyDown a groupRight across a period Atomic RadiusIncreasesDecreases ElectronegativityDecreasesIncreases Ionization EnergyDecreasesIncreases