Across
- 1. symbol for atomic mass unit
- 3. period
- 4. an ion with a positive charge
- 5. an atom or a group of atoms that has lost or gained one or more electrons and has a net electric charge
- 9. any of the possible energies an electron may have in an atom
- 14. the elements that are usually poor conductors of heat and electricity
- 15. the process of adding electrons to or removing electrons from an atom or group of atoms
- 16. the center of an atom that is made up of protons and neutrons
- 17. an element that has properties of both a metal and nonmetal
Down
- 1. an ion with a negative charge
- 2. metalloid
- 5. any atoms having the same number of protons but a different number of neutrons
- 6. a neutral subatomic particle in the nucleus of an atom
- 7. a horizontal row of elements in the periodic table
- 8. a region in an atom where there is a high chance of finding electrons
- 10. a vertical column of elements in the periodic table
- 11. a negatively charged subatomic particle found in the energy level of an atom
- 12. a positively charged subatomic particle in the nucleus of an atom
- 13. group
- 17. the elements that are good conductors of heat and electricity
- 18. the smallest particle that has the properties of an element