Changes that do not produce new kinds of matter, but simply alter the appearance of the matter are called Physical changes. Classify each of the following as either a chemical or physical change. 1. melting 6. grinding 2. electrolysis 7. boiling 3. tearing 8. mixing 4. freezing 9. distillations 5. burning 10. Compounds are two or more elements chemically combined.
Mixtures are combinations of substances that retain their individual identities.
For the following, decide whether it is an element, a compound, or a mixture. 1. pure water 7. Each chemical element has a unique on two letter symbol. Using a periodic table, locate each element listed below, record its symbol, and decided whether its properties are best classified as a metal, a nonmetal, a mettaloid or a noble gas. For the compounds below, write the correct formula.