Periodic Table Notes #1 You need YOUR periodic table and the blank one. WCHS Chemistry

Periodic Table of Elements Having a regular, repeating pattern

Dimitri Mendeleev (1869) Credited for coming up with the periodic table Arranged elements based on properties and increasing atomic mass! Left blank spaces for undiscovered elements and even predicted their properties!

Periodic Law THE ONLY THING WE CHANGED: We now organize elements by # of protons Periodic Law Properties of elements change with increasing atomic number in a periodic way.

Blank Periodic Table Groups = vertical (up and down) columns Elements have similar physical & chemical properties We will label “A” Groups with ROMAN NUMERALS!

I A VIII II A III IV V VI VII B

Blank Periodic Table Groups = vertical (up and down) colums Elements have similar physical & chemical properties We will label “A” Groups with ROMAN NUMERALS! Periods = horizontal rows Follow a repeating pattern

Label your “good” periodic table now with period and group numbers :)

Metals Good conductors, shiny, malleable & ductile (<-- easily shaped) They GIVE AWAY their electrons easily.

Metals give e-

Non-Metals Poor conductors, dull, brittle (<--NOT easily shaped) Notice that Hydrogen is a non-metal They TAKE electrons from other elements

Non-Metals take e- Metals give e-

Metalloids (“Staircase”) Have properties of both metals and non-metals.

Non-Metals take e- Metals give e- Metalloids

Groups to Know IA IIA VIIA VIIIA Alkali metals - VERY reactive

Non-Metals take e- Metals give e- Alkali Metals Metalloids

Groups to Know IA Alkali metals - VERY REACTIVE IIA VIIA VIIIA Alkaline Earth metals - REACTIVE

Alkali Metals Metalloids Metals give e- Non-Metals take e- Alkaline Earth Metals Metalloids

Groups to Know IA Alkali metals - VERY REACTIVE IIA Alkaline Earth metals - REACTIVE VIIA VIIIA Transition Metals - from metals to non-metals

Alkali Metals Metalloids Transition Metals Metals give e- Non-Metals take e- Metals give e- Alkali Metals Alkaline Earth Metals Transition Metals Metalloids

Groups to Know IA Alkali metals - VERY REACTIVE IIA Alkaline Earth metals - REACTIVE Transition Metals - from metals to non-metals VIIA VIIIA Rare Earth Metals - after #94 = man-made

Alkali Metals Metalloids Transition Metals Rare Earth Metals Non-Metals take e- Metals give e- Alkali Metals Alkaline Earth Metals Transition Metals Metalloids Rare Earth Metals

Groups to Know IA Alkali metals - VERY REACTIVE IIA Alkaline Earth metals - REACTIVE Transition Metals - from metals to non-metals Rare Earth Metals - after #94 = man-made VIIA VIIIA Halogens - VERY REACTIVE (nonmetals)

Alkali Metals Halogens Metalloids Transition Metals Rare Earth Metals Non-Metals take e- Metals give e- Alkali Metals Halogens Alkaline Earth Metals Transition Metals Metalloids Rare Earth Metals

Groups to Know IA Alkali metals - VERY REACTIVE IIA Alkaline Earth metals - REACTIVE Transition Metals - from metals to non-metals Rare Earth Metals - after #94 = man-made VIIA Halogens - VERY REACTIVE (nonmetals) VIIIA Noble Gases - INERT = DO NOT react

Alkali Metals Halogens Noble Gases Metalloids Transition Metals Non-Metals take e- Metals give e- Alkali Metals Halogens Alkaline Earth Metals Noble Gases Transition Metals Metalloids Rare Earth Metals