Chem test

vertical columns labelled 1-18

horizantal columns labelled 1-7

same substance with altered attributes

change in which 1 or more new substamces are created

never found uncombined in nature, has two valance electrons

first column, shiny, 1 valence electron

good conductors, popular metals

17th column, 7 valence electrons, most active non-metals

extremely unreastive, full outer orbit, dont combine so called inert

bottom of the periodic table

ions with a postive charge

ions with a negative charge

electrons found in the outermost orbit, electrons involved in sharing or combining

the complete tranfer of electrons from one atom to another

the sharing of one or more pairs of electrons

2 atoms of the same type form a stable covalent molecule. (HOFBrINCl)

what you start with in a chemical equation

what you end up with

the mass of the reactants needs to be equal to the mass of the products

synthesis, decompostion, double and single displacemtent and combustion

reaction wher hydrocarbon burns in oxygen to produce water and carbon dioxide

hydrocarbon burns in water to prodice a misture of products (not enough oxygen)

ph of less than 7, releases hydrogen in water

ph of more than 7, releases hydroxide in water