Across
- 2. nonmetallic elements that has some metal characteristics
- 3. central part of an atom made of protons an neutrons determines mass
- 6. shows how many atoms of an element are present i a molecule
- 7. subatomic particle with a positive electrical charge located in the nucleus
- 8. the number of protons in the nucleus
- 9. substance that cannot be broken down or changed
Down
- 1. representation of a chemical reaction of using symbols of substances
- 4. the smallest part of chemical elements
- 5. column of elements on the periodic table
- 7. substance formed as a result of a chemical reaction