Physical Science Big Quiz 10.6.09
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29 terms
Terms | Definitions |
|---|---|
 nucleus | the center of an atom and contains most of the atom's mass |
| proton | positive charge and is located inside the nucleus |
| neutron | no charge and is located inside the nucleus |
| electron | negative charge and is located outside of the nucleus |
| Dalton | atoms; gave us the modern atomic theory and said that atoms are solid spheres, atoms of the same element are exactly alike and that atoms of different elements can be combined to form compounds |
| Thomson | electrons; said that negatively charged electrons were stuck to the sphere and that the atom was neutral, so there must be positive charges somewhere |
| Rutherford | protons; said that positive charges are called protons and that protons are located in the nucleus, where most of the atoms mass is |
| Bohr | planetary model; said that electrons move around the nucleus in energy levels and its called the planetary model because the e- orbit the nucleus like the planets orbit the sun |
| Electron Cloud Model | modern day; electrons move around the nucleus in energy levels in an ever changing path and that the neutrons are located in the nucleus and are neutral |
| metals, metalloids, and non-metals | 3 types of elements on the periodic table |
| metals | located to the left of the zig-zag line and are malleable, good conductors, ductile, shiny, mostly solids, ect. |
| non-metals | located to the right of the zig-zag line and are not malleable are not good conductors, aren't ductile, no luster, ect. |
| metalloids | border the zig-zag line and have properties of both metals and non-metals |
| atomic number | written above the symbol and tells us the number of protons and electrons |
| atomic mass | tells us the sum of the protons and the neutrons |
| C | carbon |
| O | oxygen |
| H | hydrogen |
| N | nitrogen |
| P | phosphorus |
| S | sulfur |
| Si | silicon |
| Au | gold |
| Ag | silver |
| Hg | mercury |
| Al | aluminum |
| Mg | magnesium |
| Ca | calcium |
| F | flourine |
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