Across
- 3. the amount of electrons allowed in the first shell
- 4. I have 20 neutrons and can be found in your teeth and bones
- 7. I am not really an alkali metal, but since i have only 1 electron.
- 10. outside the nucleus and 1/1840 atomic mass unit
- 11. I am a metalloid with 5 protons and 6 neutrons
- 12. the amount of electrons allowed in the rest of the shells
- 13. substance made of only one type of atom
Down
- 1. row that shows the number of shells each element has
- 2. the smallest part of an element that retains the property of that element
- 4. I am a metal that has 26 protons
- 5. contains protons and neutrons
- 6. two or more atoms chemically combined
- 8. i make up 76% of the air and am found in 5th group
- 9. I am a transition metal, my electron configuration is (2,8, 8, 8, 2)