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26 Cards in this Set
- Front
- Back
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Atom |
a very small particle that makes up most kinds of matter and consists of smaller parts called protons, neutrons, and electrons |
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Nucleus |
positively charged, central (center) part of an atom |
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Proton |
positively charged particle located in nucleus of an atom |
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Neutron |
an uncharged particle located in the nucleus of an atom |
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Electron |
invisible, negatively charged particle located in a cloudlike formation that is outside the nucleus of an atom |
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Orbit |
the path of an electron around an atomic nucleus |
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Electron Shell |
the orbits outside the nucleus where electrons are found, according to Bohr’s model. |
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Valence Electron |
the electrons on the outer shell of an atom; determines an element’s chemical and physical properties |
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Scientific Theory |
a widely-accepted explanation that is supported by evidence and experimentation, but is not yet proven. |
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Scientific law |
a rule that describes a pattern in nature; has been proven true. |
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Electron Cloud |
spherical cloud surrounding the nucleus |
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Periodic Table |
a table of the chemical elements arranged in order of atomic number, arranged so that elements with similar properties appear in vertical columns |
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Atomic Number- |
number of protons and electrons in the nucleus of each atom. Located in the top of the element box |
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Period |
horizontal rows of the periodic table |
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Group |
vertical columns of the periodic table |
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Family- |
elements of the same group that share many physical and chemical properties |
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Metal |
elements that are good conductors of electricity that have a shiny or metallic luster |
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Nonmetal |
poor conductors of electricity and are dull in appearance |
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Metalliod |
an element that has some properties of both a metal and a nonmetal |
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Luster |
shiny or able to reflect light |
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Conductivity |
the ability to allow heat and electricity to pass through |
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Conductor |
lets electrons move through freely; an object with a high conductivity |
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Semiconductor |
conductivity between an insulator and most metals; an object with a low conductivity |
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Insulater |
stops the flow of electrons; an object without conductivity |
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Malleability- |
the ability of a substance to be hammered into shapes (bendable) |
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Ductility |
ability to be drawn into wire |
