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Metal elements are usually good conductors of both electricity and heat. The dividing line between metals and non-metals is not hard and fast, thus the distinction between Post-transition metals and Metalloids is represented differently on different versions of the Periodic Table.etal elements are usually good conductors of both electricity and heat. The dividing line between metals and non-metals is not hard and fast, thus the distinction between Post-transition metals and Metalloids is represented differently on different versions of the Periodic Table.
The elements of the periodic table can be broken into three different groups: metals, metalloids (or semi-metals) and nonmetals. This periodic table shows the three different groups of elements.The metalloid group separates the metals from the nonmetals. Elements to the left are metals and nonmetals are to the right.The exception is the element hydrogen. Hydrogen has properties of a nonmetal at normal temperatures and pressures.he metalloid group separates the metals from the nonmetals. Elements to the left are metals and nonmetals are to the right. The exception is the element hydrogen. Hydrogen has properties of a nonmetal at normal temperatures and pressures.