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6.1 P.Table
Term | Definition |
---|---|
periodic table | A table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together. |
Mendeleev | Created the first periodic table. Arranged elements by increasing atomic mass |
atomic mass | the weighted average of the masses of the isotopes of an element |
atomic number | the number of protons in the nucleus of an atom |
group | A vertical column on the periodic table |
period | A horizontal row of elements in the periodic table |
Periodic Law | when the elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties |
main group elements | Those elements occupying the s and p blocks of the periodic table. Groups 1,2 and 13 |
transition metals | elements that form a bridge between elements on the left and right sides of the periodic table |
inner transition metals | elements that appear below the main body of the periodic table |