3d model of an oxygen atom
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Answers:You can probably cut rings from cardboard. Attach string to hang from the ceiling.
Answers:colored styrofoam balls held together with toothpicks or straws
Answers:You could also use O shaped items since atoms do have electrons going around a field with the protons and neutrons in the middle, you could always fill something in to the middles of the 0s to represent the protons and neutrons. Afterall, the more protons, the bigger the atom, so the higher up the periodic table you got, the more dots you could have in the middle. You could use frosting or toothpaste, or even little things that looked like dots in the middle. Start with tiny rubber sealers that they use for connecting pipes or like fish tank tubing from Home Depot, those little rubber bands they make you put on your braces, or something, then go to spaghetios, cheerios and fruit loops, plastic rings, then onion rings, jelly bracelets, . . I'm trying to think of other o shaped items. Toilet paper tubes cut with scissors, rubber bands, bolts, Too bad it has to be on poster board. . . then you could use some really creative things like innertubes, hula hoops, glow bracelets and necklaces, You could also use different sized rocks, since these seem to be readily available in different sizes. You could use sand, then little tiny rocks, gravel, etc. . This would be a bit heavy, so I'd do it on a piece of plywood if you had any after spray painting it a cool color. Last idea: If you wanted to make it humorous and had some time and wanted to make this last a long time rather than just for this one assignment, you could represent each atom with a miniature figurine. Like. . .Helium could be a really tiny He-man figurine (or just the head) and Einsteinium (if you have to go that high) could be giant Einstien head. Copper (CU) could be a little dog from that movie "Fox and the Hound". . . Oxygen could be a little blue ox from paul bunyan or just an ox figurine. I know it would take forever to find all the pieces, but if you were a teacher or something wanting a cool display it would be worth it. Check out the element song while you are at it. You might get some ideas here for images.
Answers:Check this one out. We used it and my son got an A How to make a helium atom model http://www.associatedcontent.com/article/1046660/how_to_build_a_helium_atom_model.html?cat=58