Across
- 1. a positively changed elementary particle
- 2. each atomic numbers increase from left to right 1-7
- 3. a group of atoms banded together
- 5. elements that are good conductors of heat and electricity
- 6. letter standing for a name of a periodic table element
- 8. the mass of an isotope of an element
- 9. six noble gases are found in groups 18 of the peridic table
- 11. that matter can be changed from one form into another
- 16. obsorbing of heat
- 18. is a surface covering in which metal is deposited on a conductive surface
- 19. positively charged miss with an atom
- 22. elements that are intermediate in their properties
Down
- 1. a substance that is formed by a chemical reaction
- 4. release of heat
- 7. electron of an atom
- 10. helped make the periodic table
- 12. number of positive charges or protons in the nucleus of an atom
- 13. elements that are poor conductors of heat and electricity
- 14. wave function describing the state of a signal electron in an atom
- 15. a thing that is composed of two or more sewerage elements
- 16. one class of substances that cannot be separated into simpler substances by chemical means
- 17. the smallest component of an Element
- 20. groups of specific elements on the periodic table
- 21. an elementary particle that is a fundamental constituent of matter