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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 |
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