Thursday September 24, 2014

Periodic Table

-18 columns

-7 rows

-'invented' by Dmitri Mendeleev in 1869

                -He predicted properties of missing elements

                -He was mostly correct

                -It was further refined and filled out

-Each group (column) tells us about the properties

-Left to right decreases in atomic radius

-Left to right increases in electronegativity

-Left to right increases in ionization energy

Question:

1) What are some properties of metals

2) What are some properties of metalloids

3) What are some properties of nonmetals

Lewis Dot Structure

I will introduce the Lewis Dot Structure.

I will give students a paper to practice the Lewis Dot Structure

Worksheet