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| all matter is made up of individual particles called atoms, which cannot be divided. | ||
| noticed that the ratio of the masses of elements in a compound is always the same. | ||
| like charges | ||
| opposite charges | ||
| provided evidence that atoms are made of even smaller particles | ||
| Plum Pudding Model or the Chocolate Chip Ice Cream Model | ||
| Discovered the Nucleus | ||
| dense, positively charged mass located in the center of the atom. | ||
| protons, electrons, and neutrons | ||
| positively charged subatomic particle found in the nucleus of the atom | ||
| a negatively charged subatomic particle found in the space outside the nucleus | ||
| a neutral subatomic particle found in the nucleus of the atom | ||
| have a similar mass | ||
| is equal to the number of protons in an element | ||
| is the sum of the protons and neutrons in the nucleus of an atom | ||
| Equals the Mass Number minus the Atomic Number | ||
| atoms of the same element that have differnt numbers of neutrons and different mass numbers | ||
| the atom is like the solar system and the planets orbiting the sun | ||
| The possible energies that electrons in an atom can have. | ||
| Electrons move up an energy level | ||
| Electrons move down an energy level | ||
| most likely locations for electrons in an atom | ||
| region of space around the nuclues where an electron is likely to be found | ||
| when all electron in an atom have the lowest possible energies | ||
| The most stable electron configuration |
