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Chemistry Quiz #2

Why do aroms form chemical bonds? They want to become stable and fill their outer shell with valence electrons
Valance Electrons Electrons in the outer shell
Ion A positive or negative charged atom
Ionic bond a bond made by the transfer of electrons
Covalent bond a bond made by sharing electrons
Chemical reaction when bonds are made or broken to form new substances
What might indicate the occurrence of a reaction (4 things) A spontanious color change, a spontanious production of energy such as heat or light, the production of precipitate, the formation of a gas
What is a chemical reaction? A process that changes 1 or more substances into another substance
What is a chemical equation? A short-hand way of showing whats happening during a chemical reaction
Reactant A beginning material. Written before the arrow
Product An ending material. Products are written after the arrow.
A balance equation When writing a chemical equation the number of atoms on the reactant side MUST equal the number on the product side?
Mass/energy (3) cant be created, cant be destroyed, can only change
What factors affect the rate a reaction takes place? (4) Temperature, surface area, concentration, add of catalyst.
Created by: Teddy12345