Properties of the Periodic Table Periodic Table Atomic

Properties of the Periodic Table

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

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

Valence Electrons in Each Family/Group

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.

* 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 N 2, unuseable form

Oxygen is extremely reactive and combines with most other elements