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Chemistry ReView - Part 1

Chemistry ReView - Part 1 - Chemistry ReView By Vaibhav...

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Chemistry Re V iew By: Vaibhav Mokashi Chemistry Test 1 Topic Details Chemistry Study of matter and its interactions Matter Chart Chart Details Matter - Anything with density Pure Substances a substance that contains only one kind of particle Mixtures Two or more different types of particles physically placed with each other Elements a pure substance that cannot be broken down into a simpler substance Compounds a pure substance that contains two or more different elements in fixed ratios Homogeneous when the particles in a mixture appear as a single phase Heterogeneous - when the different particles (components) of a mixture can be seen States Solids (s) Liquids (l) Gas (g) Aqueous Dissolved (aq) Properties and Changes Physical Properties - characteristic of a substance that is used to identify it when no chemical change occurs Chemical Properties characteristic or property that helps identify a substance as it reacts Chemical Families Definition: Groups of elements in the same vertical column of the periodic table Alkali Metals Group 1 - include lithium, sodium, potassium - shiny and silvery metals - form compounds - white solids and soluble in water Alkaline Earth Metals Group 2 Matter Pure Substances Elements Compounds Mixtures Homogenous Heterogenous
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- include magnesium, calcium, barium - shiny and silvery metals - form compounds often insoluble in water Noble Gases - Helium, Neon - Do not form compounds Halogens Group 17 - Nonmetallic elements include: fluorine, chlorine - Poisonous elements - React with sodium and other alkali metals Elements and Atomic Structure The group number gives the number of electron in outermost/valence energy shell/shell. The period number is how many shells are used. Particle Symbol Charge Location Mass (u) Proton P + 1 Nucleus 1 Electron E - 1 Shell/Energy levels 1/3700 Neutron N No charge Nucleus 1 Bohr Diagrams Shell 1 : 2 electrons Shell 2 : 8 electrons Shell 3 : 8 electrons When nonmetals gain electrons to become stable, the name changes from ion to “ide” = ex. Fluoride ion.
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