The Periodic Table (NOT FINISHED)

Decoding the Periodic Table of Elements

  • Elements are identified by a chemical symbol

  • Rows are called periods

  • Columns are called groups: Group 17=Halogen Family, Group 18=Noble Gases

  • Hydrogen: The properties of hydrogen do not match the properties of any single group, so hydrogen is set apart from the other elements in the table.

The Atom

Models of the Atom

  • An atom is the smallest particle of an element that has properties of that element.

  • Scientists use many models to describe the atom

The Parts of an Atom

  • The proton is a particle that gives the nucleus its positive charge. The number of protons in an atom is called the atomic number.

  • The Electron is a particle that moves around the nucleus forming a cloud of negative charge

  • The Neutron is a particle with no charge. Neutrons are in the nucleus.

Chemical Activity
  • The chemical activity of an element is how easily the element reacts with other elements.
  • Metals: Elements on the left side of the table. Atoms of most metals have three or less valence electrons. The most active metals are found at the bottom left corner of the table. (Francium)
  • Nonmetals: Elements on the right side of the table. Nonmetals usually have five or more valence electrons. The most active nonmetal is in the upper right corner of the periodic table, excluding noble gases. (Fluorine)
  • Metalloids: The six elements located on

\ \ \ \ \