Breaking the Code

The Periodic Table

The “Modern” Periodic Table that we use today was started by a scientist named Mendeleyev.

Earlier Periodic Tables were not organized quite the same way as the one we use now…

Future scientists paid more attention to many of the different properties of each individual element and found that they could organize the elements based on these properties.

The Periodic Table

We have already uncovered some of the patterns that exist on the “Modern” Periodic Table.

Today we will uncover more!!!

The Periodic Table

Today’s Big Question…

How can you predict properties of elements using the Periodic Table?

You will use a poster that only contains the columns that we have already found patterns for (Groups 1-2 and 13-18) and your own “Modern” Periodic Table (from your binder!!!)

The Periodic Table

Each element on the poster has specific info. Re: physical and chemical properties.

Wrap-Up Discussion

Electron Configuration and Properties

Which of the patterns that we have discussed are related to the element’s Electron Configuration?

The reactivity pattern, size, valence e- pattern, and the compound formation pattern, oxidation number.

What type of properties are these?

These are mostly chemical properties. (size is not.)

Wrap-Up Discussion

Given an element that is located in Group 17 and Row 2, describe everything you can about this element.

It’s a nonmetal, has 7 valence e-, forms an ion with a -1 charge, it is a gas at room temperature, it is extremely reactive, nonconductive, possibly flammable, low melting /boiling point and it’s a smaller atom.

Wrap-Up DiscussionUse the cards for Cu, copper, and Au,

gold, to describe all you can about the element silver, Ag. WITHOUT looking at your periodic table!!!

shiny, reddishmetal

found inCuCl

Reacts slowly in air

Copper shiny, yellowmetal

found inAuCl

Not reactive

Gold

Cu63.5

Au197.0

Wrap-Up Discussion

You should have been able to predict what Silver would look like, an estimate of its atomic weight, its reactivity, what other element it would form a compound with, its relative size, and how many “prongs” = valence e- it would have.

Wrap-Up DiscussionHow did you do?!?!

Found in AgCl

Shiny metal

Reacts very slowly with air.