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