Match the following. 1. an ancient study or art which attempted to combine science and philosophy to solve worldly problems atom 2. a homogeneous mixture of elements with metals to form metallic solids metal 3. the simplest unit of an element that still retains the properties of that element alchemy 4. two or more elements joined together such that the elements have lost their individual identity element 5. a primary substance that cannot be divided into separate substances nonmetal 6. the group of elements that are good conductors of electricity and heat compound 7. the group of elements that are poor conductors of electricity and heat alloy.