Mendeleev arranged his periodic table in order of increasing atomic number.
The periodic table is an arrangement of elements showing the repeating pattern of their properties.
The rows in the periodic table are called periods.
Moving across the periodic table from left to right, one finds, in order, metals, then gases, then nonmetals.
The number of valence electrons detemines the electron's reactivity.
Another name for a period is a family.
On the periodic table, elements in the same column have similar properties.
Helium has chemical properties so different from those of the other elements that it cannot be placed in any group.
If a material can easily be drawn into the shape of a wire, it is
Which of the following is NOT a characteristic of most metals?
Which of the following is NOT a property of most nonmetals?
The atomic number of an element is based on the
In general, which of the following statements about metals is true?
The only nonmetal in Group 14 is
The highly reactive elements of Group 17 are called the
Name the three basic parts of an atom.