Notes

Slide Show

Outline

1	Reading the Periodic Table
2	A way of organizing & classifying elements according to their PROPERTIES Arranged in rows and columns
3	Columns The vertical (up and down) columns of the periodic table (there are 18) are called groups or families. Elements in the same group or family have similar characteristics or properties.
4	Rows The horizontal rows of the periodic table are called periods. Elements in a period are not alike in properties. The first element in a period is usually an active solid, and the last element in a period is always an inactive gas.
5	Rows Atomic size (number of protons) decreases from left to right across a period. Atomic mass (number of protons) increases from left to right across a period.
6	Rows Electrons are added one at a time moving from left to right across a period The electrons of the outermost shell have increasingly strong nuclear attraction, so the electrons become closer to the nucleus Ionization energy increases Electronegativity increases
7	Quick Review of electron shells
8	Rows Metals are on the left Non-metals are on the right