Periodic table of elements
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Element | Substance that cannot be split up into simpler substances by chemical means
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| Triad | Group of three elements with similar chemical properties in which the atomic weight of the middle element is approximately equal to average of the other two
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| Newlands' Octaves | Group of elements arranged in order of increasing atomic weight, in which the first and the eighth element of each group have similar properties
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| Mendeleev's periodic law | When elements are arranged in order of increasing atomic weight, the properties of the elements vary periodically
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| Atomic number | is the number of protons in nucleus of that atom
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| Modern Periodic Table | Arrangement of elements in order of increasing atomic number
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| Mass Number | Sum of the number of protons and neutrons in the nucleus of an atom of that element
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| Isotope | atoms of an element (they have the same atomic number) that have different mass numbers
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| Relative atomic mass | Average mass of atoms of element relative to 1/12 th the mass of carbon 12 atom
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| Aufbau Principle | states when building up the electronic configuration of an atom in its ground state, the electrons occupy the lowest available level
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| Pauli exclusion principle | no more than two electrons may occupy an orbital and they must have opposite spin
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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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Created by:
mrs kennedy
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