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