1. The periodic table

2. Let’s sort… cut out all 19 puzzle pieces
arrange the pieces into rows and columns according to their properties
identify as many trends as you can
keep in mind that one of the puzzle pieces is missing
sketch the missing piece showing all its properties

3. Learning goals
We are learning to identify patterns in the periodic table.
We are learning to identify the first 20 elements of the periodic table.

4. origins Dmitri Mendeleev mid to late 1800s
found patterns and was able to group elements together
we use a table based on his work

5. Row, row, row your … seven horizontal rows called periods
hydrogen and helium are in Period 1
potassium is the first of 18 elements in Period 4

6. Let’s group it!
18 vertical columns called groups (also called a chemical family)
elements within a group share certain physical and chemical properties
carbon (C) is in Group 14
common to refer to a group by the first element in it. Group 14 is also called the carbon group.

7. organization

8. Group 1: Alkali metals Li, Na, K, Rb, Cs, Fr
silver-grey in colour; malleable and ductile, and conduct electricity and heat
low melting points
soft enough to cut with a knife
react easily with water and air

9. Group 2: Alkaline earth metals
Be, Mg, Ca, Sr, Ba, Ra
shiny
silvery-white
somewhat reactive metals
low melting and boiling points

10. Group 17: halogens F, Cl, Br, I all are non-metals
gases (Br liquid; I solid)
noticeable colour
chlorine, bromine, and iodine can be used as disinfectants

11. Group 18: Noble gases He, Ne, Ar, Kr, Xe, Rn
exist naturally as colourless gases
will glow with bright colours if an electric current is passed through them
neon light
inert – not chemically reactive

12. Ahhhhhh, I c…
element name
atomic number
element symbol
atomic mass

13. Standard Atomic Notation
Identifies important information
Atomic mass 4 He
Atomic number 2

14. Learning goals
We are learning to identify patterns in the periodic table.
We are learning to identify the first 20 elements of the periodic table.

15. Textbook 6.4 Please complete #1,2,3,6,8,9,10.
Study the first 20 elements!!!