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__**Ionic Bonding: metal and non-metal**__ Magnesium + Oxygen (Mg + O) -> Magnesium Oxide (MgO)

__**Covalent Bonding: two non-metals**__ Nitrogen + Oxygen (N 2 + O 2 ) > Dinitrogen trioxide (N 2 O 3 )

Acids: Turns blue litmus paper red, tastes sour, reacts with some metals to form hydrogen gas, conducts electricity when dissolved in solution, combines with a base to produce water and salt, corrodes some metals, and produces hydrogen ions. Always have a Hydrogen at the beginning of the formula, with the exception of acetic acid (vinegar). Bases: Turns red litmus paper blue, tastes bitter, slippery feel, conducts electricity in solution, combines with acid to produce water and salt, and produces hydroxide ions. Always have a Hydroxide ion at the end of the formula. Salts: Formed by mixing acids and bases, taste salty, conduct electricity in solution, and evaporate into crystals when in solution. Made up of a metal and a non metal.
 * __Characteristics of Acids, Bases, and Salts:__**

HF - Hydrogen fluoride - hydrofluoric acid HCl - hydrogen chloride - hydrochloric acid HBr - hydrogen bromide - hydrobromic acid HI - hydrogen iodide - hydriodic acid
 * __Common Acids__**



Organic compounds are almost all compounds which contain carbon, with a few exceptions such as carbon dioxide. Inorganic compounds refer to compounds that generally don't contain carbon, with a few exceptions such as carbon monoxide.
 * __Organic Compounds__**