Matching Pairs Vocab #11-18Online version PT vocab by Sarah Kniss 1 NONMETAL: Helium, oxygen, and fluorine are examples of nonmetals. 2 METALLOID: Silicon is an example of a metalloid because it has some properties of metals and others of nonmetals. 3 METAL: Elements that are metals have 3 valence electrons or fewer. 4 FAMILY: Carbon and silicon are in the same family in the periodic table. 5 PERIOD: Hydrogen and helium are both located in the top period of the periodic table. 6 MENDELEEV: Mendeleev's contribution was critical to the field of chemistry. 7 GROUP: Boron and aluminum are both in group 13 on the periodic table. 8 PERIODIC: The days of the week are periodic. scientist who arranged elements into a table and used it to predict unknown elements horizontal row on the periodic table another name for a group on the periodic table element on the right side of the zigzag line on the periodic table repeating in a pattern element bordering the zigzag line on the periodic table vertical column on the periodic table element on the left side of the zigzag line on the periodic table