WCHS Mrs. Herrick Honors Chemistry Classification of the Periodic Table

Who created the periodic table? How did he do it?

Dimitri Mendeleev; he arranged elements based on properties and increasing atomic mass

How did we change the periodic table from the original form?

We now organize elements by the numbers of protons

What is the periodic law?

Properties of elements change with increasing atomic number in a periodic way

What do groups (or columns) in the periodic table have in common?

Those elements have similar physical and chemical properties

What do periods (or horizontal rows) follow?

A repeating pattern

Metals

• Good conductors, shiny, malleable, & easily shaped

• They give away their electrons easily

Non-Metals

• Poor conductors, dull, brittle, not easily shaped

• They take electrons from other elements

Mettaloids (staircase)

• Have properties of both metals and non-metals

• They are also very good as semiconductors, used in all of our computer chips

Alakali Metals

• Very reactive

• Lose one electron when bonding

Alakaline Earth Metals

• Reactive

• Lose 2 electrons when bonding

Transition Metals

Transitions from metals to non-metals

Rare Earth Metals

After #94= man-made

Halogens

• Very reactive (nonmetals)

• Make bonds by gaining, or sharing electrons

Noble Gases

Inert= do not react

Label the image

1. Alakali Metals

2. Alkaline Earth Metals

3. Transition Metals

4. Metalloids

5. Halogens

6. Noble Gases

7. Rare Earth Metals

What does the yellow group represent?

Non-metals

What does the blue group represent?

Metalloids

What does the green group represent?

Metals