1. Properties of the Periodic Table

2. Periodic Table:
Atomic number – the identity of an element
Row = Period (Horizontal Rows #1-7)
            The atomic # increases as you go from left to right
            Atomic# = # protons (p) = # electrons for a neutral
atom
Properties change somewhat regularly as you go across
Column = Group = Family (Vertical Columns #1-18)
            Elements in a group have similar chemical properties

3. Valence Electrons
The electrons in the outer most electron shell are called valence electrons
The shell containing electrons that is furthest from the nucleus is called the valence shell
The number of electron shells with electrons is the same as the period (row) number
The number of valence electrons is the same as the family (column) number

4. Valence Electrons in Each Family/Group

5. Periodic Table Flipbook
Elements of the same group/family (column) share similar physical and chemical properties – that’s what allowed scientists to group them as such.
You will create a “flipbook” to help you record the properties of the families. That way, you don’t have to memorize all of them. You may use this flipbook on the Unit Test and on the Final.
Instruction handouts can be found on your table and can also be found online. Use the following slides about the families to copy down their properties.

14. * Useful for living things in small amts, deadly in large quantities
* Red stuff on the tips of matches is P.
* 78% of the earth's atmosphere made up of N2, unuseable form

15. Oxygen is extremely reactive and combines with most other elements