8U1 - 5(C) interpret the arrangement of the Periodic Table, including groups and periods, to explain how properties are used to classify elements;

The Noble Gasses, Helium, Neon, Argon, Krypton, and Xenon glow when heated.

Elements have characteristic colors when burned.

An arrangement of the elements in order periodic of their atomic numbers. elements with table similar properties fall in the same column, or group.

Periodic Table On the periodic table, the Square number in the left corner Information is the number of protons, the number in the right corner is the atomic weight, the Symbol for the element is in the center, and the name is on the bottom. Atomic The number of protons, number unique to each element, in an atom

Atomic Number The number of protons in the nucleus of an atom.

Atomic Mass total weight of protons and neutrons

Atomic Mass The average mass of one atom of an element.

Chemical One or two letter code that symbol stands for an element; many symbols are abbreviations of the elements named, which may be English, Latin or Greek in origin

• Finding the round off the atomic mass Number of to the nearest whole Neutrons in an number and subtract the Atom atomic number from it. • Finding the look at the atomic number Number of on the periodic table Protons or Electrons in an Atom A vertical column of family/group elements in the periodic table; elements in a group share chemical properties. Because they have the same number of valence electrons, they have similar properties and reactivities

Horizontal row in period periodic table. Properties are NOT similar across periods!

Reactive Elements like oxygen, hydrogen, and sodium are very reactive. They can explode easily and must be handled with care in their pure form.

Inert Elements such as Helium, Neon, Argon, Krypton, and Xenon are known as the “noble” gasses because they are inert – they do not react with other elements. Nitrogen is a fairly inert element.