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1st Semester Vocab
| Term | Definition |
|---|---|
| Atom | the building block of matter |
| Element | the most pure type of matter; it cannot be broken down |
| Nucleus | the center of an atom |
| Electron Shell | the outer shell of an atom in which electrons reside |
| Proton | positively charged particle, in nucleus, defines atom |
| Neutron | no charge in particle, in nucleus, different # makes an isotope |
| Electron | negatively charged particle, in the electron cloud, different # makes an ion |
| Atomic Number | determined by the amount of protons in an atom |
| Atomic Mass | mass of an atom based on the mass of the protons and neutrons |
| Valence Electron | the electrons in the outermost shell |
| Metal | elements located in the middle and left side, that are usually solid and good conductors |
| Nonmetal | elements located on the right side of the periodic table, that are poor conductors, and usually gases |
| Metalloid | an element with both nonmetal and metal properties |
| Group | column of elements that have the same number of valence electrons and chemical properties |
| Period | row of elements that share the same # of electron shells |
| Transition Elements | the elements in groups 3 to 12 |
| Representative Elements | the elements in groups 1-2 and 13-18 |
| Ion | forms when there are a different # of electrons |
| Isotope | forms when there are a different # of neutrons |
| Force | a push or a pull |
Created by:
w0501826
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