Terms associated with basic atomic structure and the Periodic Table.
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| element | made of only one kind of atom
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| atom | smallest part of an element that keeps its properties
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| symbol | abbreviation for an element (1-2 letters)
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| proton | positively charged subatomic particle in atom's nucleus
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| neutron | neutral subatomic particle in atom's nucleus
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| electron | negatively charged particle orbiting atom's nucleus
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| nucleus | small, dense, positively charged center of an atom
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| energy level | path in which electron moves around nucleus
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| 2 | capacity of 1st energy level
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| 8 | capacity of 2nd energy level
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| 18 | maximum capacity of 3rd energy level
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| valence | describes electrons in the outermost level in atom
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| atomic number | tells the # of protons in an atom
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| neutral | overall charge of an atom since the # of protons and electrons are equal
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| group/family | vertical column on periodic table; can be used to tell the # of outer (valence) electrons in an atom
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| period/series | horizontal row on periodic table; tells the # of occupied electron energy levels
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| Bohr model | shows how electrons are arranged in levels around nucleus
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| helium (He) | only element in the 'tall' groups whose group # does not tell the # of valence electrons
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| amu (atomic mass unit) | unit of mass used for subatomic particles/atoms since the kilogram is too large
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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