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1st Semester Vocab.
| Term | Definition |
|---|---|
| Atom | The basic unit of all matter |
| Element | A substance that can not be broken down |
| Nucleus | The center of an atom. It contains protons and electrons |
| Electron Shell | a grouping of electrons surrounding the nucleus of an atom |
| Proton | Particle of an atom that is in the nucleus and has a positive charge |
| Neutron | Particle of an atom that is in the nucleus and gives no charge |
| Electron | particle of an atom that si outside of the nucleus and gives a negative charge |
| Atomic Number | Amount of atoms that are in an element |
| Atomic Mass | The mass of a an atom |
| Valence Electrons | The amount of the outermost electrons |
| Metal | A solid material that is a good conductor,is ductile, and is malleable |
| Non-metal | A material that is brittle/dull, a bad cunductor, and not solid |
| Metalloid | A material that has the characteristics of both metals and non-metals |
| Group | A collumn of elements on the periodic table that have the same number of valence electrons and have similar characteristics |
| Periods | A collumn of elements on the periodic table that have the same number of electron shells |
| Transition Elements | Any set of a metal element that is occupying a central block |
| Represenative Elements | Elements that don't show valence variables |
| Ion | An atom or a molecule with a net charge due to the loss or gain of one or more electrons |
| Isotope | An element where the number of neutrons is decreased or increased |
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n0406710
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