Use the periodic table to identify the number of core electrons and the number of valence electrons in each case below.Magnesium
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In the modern periodic table, the elements are arranged according to their atomic number - not their relative atomic mass.
In the periodic table the elements are arranged into:
rows, called periods, in order of increasing atomic number
vertical columns, called groups, where the elements have similar properties
In the periodic table the elements are arranged into:
rows, called periods, in order of increasing atomic number
vertical columns, called groups, where the elements have similar properties