Across
- 1. formula combination of symbols that represent a compound
- 5. shells orbit of electrons around the nucleus of an atom
- 6. atom that has become electrically charged because it has lost or gained elections
- 7. change change in the appearance or state of a substance that does not change the composition
- 8. substance is only made up of one matter
- 10. chemical reaction that releases energy
- 12. is also a cloudy mixture but the particles are to small that its cannot be separated easily
- 13. mixture mixture in which the different substances that make up the mixture visible
- 14. number its the sum of the number of protons and neutrons in an atom
- 16. substance that reacts with another substance in a chemical to create a new substance
- 19. ions group of atoms acting as one
- 20. positive charged particle in the nucleus of an atom
- 21. compound pure substance formed when at least one metal and one non metal combine
Down
- 2. group of atoms joined by covalent bonds
- 3. vertical column of elements in the periodic table
- 4. is a cloudy mixture in which tiny particles of one substance are held within another
- 9. property description of how substance interacts with other substance
- 10. reaction chemical reaction that absorbs energy
- 11. gas group 18 elements in the periodic table the most stable and unreactive elements
- 14. shiny,malleable,ductile element that conducts electricity
- 15. change when the results of 2 substance created a new substance but a different substance from the first 2
- 17. chemical combination of 2 or more elements in a specific ratio
- 18. number number of protons in the nucleus of one atom of an element
- 19. horizontal row of elements in the periodic table