1. Bell Ringer What element is located at period 4 group 8?
What element has 45 protons?
What period and group is Iron located in?

2. Isotopes
Integrated Science

3. Isotopes
Atoms of the same element with different numbers of neutrons. If they have different numbers of neutrons then they have different mass numbers.

4. Examples
Find the number of protons, neutrons, and electrons for each.

5. How to name isotopes!!
Carbon is the mass number How many protons, neutrons, and electrons does Carbon-12 have?
Carbon is the mass number How many protons, neutrons, and electrons does Carbon-14 have?

6. More examples
Chromium Mass number is ________ 2. Find the number of protons, neutrons, and electrons for Chromium-58? 3. Draw this isotope. Protons (+), Neutrons (o), Electrons (-)
Chromium Mass number is ________ 2. Find the number of protons, neutrons, and electrons for Chromium-63? 3. Draw this isotope. Protons (+), Neutrons (o), Electrons (-)

7. Practice On your marker board, finish this table and draw the isotope.
Silver- 111
Silver-120
# of protons 47
# of neutrons
# of electrons

8. Practice On your marker board, finish this table and draw the isotope.
Tin- 122
Tin-131
# of protons
# of neutrons
# of electrons

9. Worksheet
You have the rest of the class to work on this worksheet. If you do not finish in class it is homework.