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8SC periodic table

periodic having a regular. repeatingp pattern
periodic law chemical and physical properties of elements are periodic functions of their atomic numbers
period a horizontal row of elements on the periodic table
group a column of elements on the periodic table
Alkali metals elements in Group 1 of the periodic table; they are the most reactive metals, and their atoms have one electron in their outer level
Alkaline-earth metals elements in Group 2 of the periodic table; they are reactive metals but less reactive than alkali metals; atoms have two electrons in their outer level
Halogens elements in group 17 of the periodic table; very reactive nonmetals, atoms have seven electrons on their outer level
Noble gases unreactive elements in Group 18; atoms have eight electrons in outer level(except helium - 2 electrons outer level)
chemical formula shorthand notation for a compound or diatonic element using chemical symbols and numbers
chemical equation shorthand description of chemical reaction using chemical formulas and symbols
Exothermic term that describes a physical or chemical change in which energy is released or removed
endothermic term used to describe a physical or a chemical change in which energy is absorbed
Law of conservation of energy states that energy is neither created of detroyed
Law of conservation of mass state that mass is neither created nor destroyed in ordinary chemical and physical changes
theory unifying explanation for broad range of hypotheses and observations that have been supported by testing
Created by: cynthia_ritter