1. Warm up 2/18/13 Draw a picture of what an atom looks like.
Label as many parts as you can.
Give example of types of atom?

2. Atom

3. Atom

4. Unit EQ:How is periodic table arranged? Subatomic particles?
Warm-up 10/1/13
How many protons, neutrons and electrons does Thorium-232 and Thorium-236 have?

5. Unit EQ: How is Periodic Table arranged?
Warm-up
What does the word periodic/period mean to you?
Open book to p158
Get 3 colored pencils out of drawer
repeating in a predictable pattern

6. Unit EQ: How is Periodic Table arranged?
Three main classes of elements
Then within those 3
18 groups (columns)
7 periods (rows)
Metal metalloids non-metals

7. Calculating subatomic particles
Atomic number (Z)= # protons = # electrons
Atomic Mass (A)– weighted average -atomic mass equal to # of protons plus # of neutrons in nucleus
Mass number = protons + neutrons for specific isotope
Isotope – atom of same element with different # of neutrons and therefore different mass numbers.

8. Unit EQ: How is Periodic Table arranged?
Mendeleev – 1869 (russian) arranged elements according to atomic mass. 1st periodic table
He left blanks in table –predicted presence of unknown elements – Awesome!
Lothar Meyer – a little late
Moseley – 1913 (british) made slight change and arranged by atomic number. Modern periodic table

9. Ticket out the Door 10/8 1)How many protons does Yttrium-90 have?
2) How many electrons in Y-90?
3) How many neutrons in Y-90?
4) Who is given credit for discovering the nucleus?
5) Which of the following is a metalloid?
sodium , silicon, nitrogen
6) Which of the following is a non-metal?
boron , sulfur, nickel
7) What group is germanium in?
8) What period is germanium in?

10. RedoTicket out the Door
Convert the following to scientific notation
1) 237, ) 50000 3)
Convert units – write units with #’s
4) 14 millimeters to meters
5) 50,000,000 milliliters to kiloliters
6) What is the density of a 75g sample that occupies 3.5cm3 space?

11. Define mixture – solution- homogeneous – heterogeneous – compound
element
substance
uniform/same throughout
different throughout