Science 3
Terms
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- ionic bond/compound
- a compound that consists between a metal and a non metal that give eachover electrons to become stable
- products
- a substance formed as a result of a chemicle reaction
- sublimation
- the change of state from a solid to a gas
- decomposition reaction
- a reaction in which compounds break down to simpler forms
- activation energy
- energy needed to start a chemical reaction
- diatomic molecule
- a molecule with two colvalent bonds
- stable
- when an element has eight valence electronsor un-reactive
- chemical equation
- a simple way of showing a chemicle reaction using symbols
- dry ice
- frozen carbon dioxide
- noble gases
- unreactive elements on the periodic table of elements
- exothermic reaction
- a reaction that releases energy in the form of heat
- molecule
- a neutral particle made between two nonmetals
- endothermic reaction
- a reaction that absorbs energy in the form of heat
- reactants
- a substance that enters a chemicle reaction
- synthesis reaction
- a reaction in which two simple substances combine to become a complicated substance
- subscript
- a nuber in a chenicle formula that tells the ratio of elements in a compound
- physical change
- a change that does not change one substance into another
- chemical formula
- a formula used to represent the elements in a compound
- ion
- an atom or a group of atoms that have an electrical charge
- valence electrons
- electrons on the outest energy lever
- double replacement reaction
- a reaction in which two compounds switch two elements to form new substances
- combustion reaction
- a recation between oxygen and feul that causes a fire
- chemical property
- a property of a substance that discribes its ability to change into another substance
- covalent bond/compound
- a compound between two nonmetals that share electrons to become stable
- coefficent
- a number in front of a chemicle formula of an equation that idicates how many molecules or atoms of each reactant or product involved
- structural formula
- a description of a molecule that shows the kind, number, and arrangement of atoms
- oxidation number
- the electrons extra or needed to become stable
- chemical change
- the process in which a substance changes from one to another
- physical property
- a property of a substance that can be observed without changing it into another substance
- precipitate
- a solid that forms during a chemicle reaction
- polyatomic ion
- an ion made of more than one atom
- single replacement reaction
- a reaction in which one lonely element bumps out another one in a compound takes its place to form a new substance
- catalyst
- a mineral used to speed up a chemicle reaction by lowering the activation energy