click below
click below
Normal Size Small Size show me how
Compounds
Chapter 5
Question | Answer |
---|---|
chemical change | a change that produces one or more new substances with new chemical properties |
physical change | a change in which the appearance(physical properties) of a substance changes, but its chemical properties stay the same |
energy level | one of the spaces around the nucleus of an atom in which an electron moves |
ion | an atom that has either a positive or a negative charge |
chemical bond | the attractive force that holds atoms together |
chemical formula | tells the kinds of atoms and how many of each kind are in a compound |
subscript | a number in a formula that tells the number of atoms of an element in a compound |
radicals | a group of two or more atoms that acts like one atom |
binary compound | a compound that contains two elements |
acid | a compound that reacts with metals to produce hydrogen |
base | a compound that contains the hydroxyl (OH) radical |
indicator | a substance that changes color when in an acid or a base |
pH | a number that tells whether the substance is an acid or a base |