Bottom row for the second element with atomic number from 58 -71 small groups of elements in the sixth period called the rare earth elements. And elements with atomic numbers ranging from 90-103 is a subgroup of the periodic elements in 7 groups called actinides
towards the right hand side of the table will have a hard landing. The right of a non-linear element. To the left of the line to the metal. For the elements that are close to the property line, this is both metals and non-metals include antimony, arsenic, boron, silicon, germanium, Thelma Lou Williams and Rydberg call them that metalloid elements.
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