Across
- 1. positively charged ion
- 4. group 1 except H
- 5. group 17 elements
- 9. the temperature where liquid changes to gas
- 11. i see something that is puzzling and that i cannot explain
- 13. any compound that forms H+ ions in solution
- 17. the number system for the number of groups
- 20. the center of an atom that holds protons and neutrons
- 21. atoms that have the same element but different amount of neutrons
- 23. group 2 elements
- 24. 2000mg = how many grams
- 25. one of the elements that make up the atom and have a charge of +1
- 27. which holds the most common element such as nickel,iron, and copper
- 31. group 18 also very nonreactive
- 33. horizontal row
- 34. helium contains -------- lines than the hydrogen spectrum
- 36. when a solid turns to a liquid
- 39. sodium chloride is changed to metallic sodium and chlorine gas. The process represents a………
- 40. the vertical columns of the periodic table represents
Down
- 1. sharing of electron between atom and molecule
- 2. poor conductor of heat and electricity
- 3. mass per unit volume
- 6. negatively charged ion
- 7. vertical column
- 8. mass of all the isotopes in an element
- 10. is changed during the experiment
- 12. most reactive
- 14. group 3-12
- 15. both metals and nonmetals
- 16. what i get when i run an experiment
- 18. the ending of a second word in an ionic compound
- 19. positive and negative charged atom
- 22. made up of more than one atom
- 25. positive and negative charged electrons in the shape of a sphere
- 26. I develope an initial explanation that answers the question I ask
- 28. the holding together of 2 or more atoms by covalent bond
- 29. Will change as the independent variable changes
- 30. the charge of monatomic ion
- 32. the hypothesis experiments are important because they
- 35. number number of protons in a atom
- 37. the force that holds two atoms together
- 38. which of the following is in the p-block: Te, Ta, Ti,or ™