Across
- 2. time it takes for half of a material to decay
- 4. atom part that has positive charge
- 6. bond between metal elements
- 7. has 12 protons
- 10. Calcium is in this Earth Metal family
- 12. making one side of chemical equation equal to the other
- 16. electrons travel these paths
- 18. mixing acid with base
- 21. center section of an atom
- 22. decay that a sheet of aluminum can stop
- 24. Atomic ____ is the number protons and neutrons
- 25. has a pH of 0 - 6, tastes sour
- 26. bond made with metal and non-metal
- 27. called the ____ gases because they are inert
Down
- 1. atomic model with orbitals
- 2. Iodine is in this family
- 3. type of element copper is
- 5. neutral charged part of atom
- 8. decay particle which is a Helium atom
- 9. type of chemical that tastes bitter
- 11. type of element Oxygen is
- 13. bond between non-metals
- 14. 92 protons and electrons
- 15. same element, different number of neutrons
- 17. this type of decay has the highest energy
- 19. any particle that has a charge
- 20. family that contains Potassium
- 23. negative part of the atom
- 24. element that likes to give up its valence electrons