ElementsElements

ElementElementPure substances; cannot be separated into

simpler substances

Periodic Table• Organizes elements by physical and

chemical properties.

Pair/Share

• What are the 3 main “groups” on the Periodic Table? (Hint: You learned this is 6th/7th grade)

• Can you name some characteristics of each group?

Periodic Table• The periodic table organizes elements by

physical and chemical properties.

D

E

N

S

I

T

Y

M .

E .

L P

T O

I I

N N

G T

M P

E O

L I

T N

I T

N .

G .REACTIVE

Organized by groups

• Columns • Numbered (How many groups

are there on the PT? )• Valence electrons • Family – React the same

• Group 18 of the periodic table

Defining Characteristic:• They do not combine with other

elements

Example - Noble Gases

Organized by periods

• horizontal rows • (how many periods are there?) • atomic number increases from left to right

Pair/Share

• What are 3 new ways you have learned that the Periodic Table is organized?

Element CubeElement Cube4 pieces of information:

* Atomic Number – No two are the same!

* Element Symbol (abbreviation) -ALWAYS starts with a

capital letter -Has only 1 capital letter;

everything else is lower case!

* Element Name

* Atomic Mass (what is MASS???)_When using this number,

always round!