Across
- 3. atoms of the same element that have different numbers of neutrons
- 5. Nobel gas in period 2 of periodic table
- 8. the three dimensional shape of methane
- 11. CaO is an example of this type of compound
- 12. particle with a neutral charge(0) found in the nucleus of an atom
- 14. where the electrons are in the shells of an atom.
- 17. anything that is inside an atom (eg proton, neutron, electron)
- 20. elements with the same number of electrons in their outer shell belong to the same______
- 21. particle with a negative (-) charge found orbiting the nucleus of an atom
- 22. a common element found in many organic molecules with carbon and hydrogen
- 23. middle of an atom
- 25. the cation in sodium carbonate
- 27. particle with a positive (+) charge found in the nucleus of an atom
- 28. path an electron moves in around the nucleus of an atom
- 29. an atom that has gained or lost some electrons.
Down
- 1. atoms of the same type, they have the same number of protons. For example, all hydrogen atoms have 1 proton, all carbon atoms have 6 protons. Hydrogen and carbon are different elements
- 2. the three dimensional shape of NH3
- 4. different compounds with the same formula
- 6. the electron configuration of this element is 2,8,2
- 7. bonding where electrons are shared
- 8. the number of electrons sulfur needs to get a full outer shell
- 9. smallest particle that something can be broken down into
- 10. C2H2n+2
- 13. element number three
- 15. the scientist who discovered that atoms had a positive nucleus and electrons orbited outside the nucleus
- 16. will not bond with another atom
- 17. the space that an electron is found in an atom. Different shells have different energy levels. Shell names are K, L, M ,N
- 18. a negative ion
- 19. methanol is an example
- 24. an ion that has lost one or more electrons
- 26. number of bonds carbon forms