Across
- 5. he discover neturons in 1932
- 7. Baking a cake is _____ change
- 9. good conductors of head and electricity
- 12. he was known as the father of modern chemistry
- 15. a region in space in which there is high probability of finding an e-
- 17. average mass of all the atomic masses of the isotopes of that atom
- 18. elements in this family are fluorine, chlorine, bromine, iodine and astatine
- 19. describing without numbers
- 21. poor conductors of heat and electricity
- 22. refers to how many protons an atoms of that elements has
- 24. shape of dumbbell, holds 2 electrons in each orbital
- 25. Longest wavelength, 700nm
- 26. columns of elements is called______
- 29. are bundles of light energy that emitted by e- as they go from higher energy level to lower levels
- 30. the amount of energy required to move an e- from one energy level to another
Down
- 1. table that organizes the elements is particular way
- 2. ______have the same number of electrons and protons
- 3. e- in the outer energy level of an atom
- 4. making orange juice is ______ change
- 6. shortest wavelength 400nm
- 8. they are horizontal; rows of elements is called______
- 10. using numbers to describe
- 11. they are the most reactive metals, always bonded with another elements
- 13. levels S,P,D,F are the ______
- 14. Plum pudding model
- 16. they are colorless gases that are extremely un-reactive
- 20. have properties of both metal and nonmetal
- 23. a part or aspect of something abstract, especially one that is essential or characteristic
- 27. ____are atoms that have an unequal number of electrons and protons
- 28. the energy level are like the ____ of a ladder but not equally spaced