1. Bell Work N2K
Only one subatomic particle can change when an element becomes an isotope of itself. Next to each subatomic particle, write ‘yes’ next to the one(s) that can change and ‘no’ next to the one(s) that cannot change to make an element an isotope.
Proton
Neutron
Electron
Which subatomic particle tells you the name of an element?
A specific atom of Rubidium has 49 neutrons. What is it’s atomic mass? (Give final answer in amu.)

2. Naming Isotopes August 23, 2017
Today’s Agenda:
Bell Work/Word Wall
Naming Isotopes(Notes)
Paper Roulette!!!
Today’s Word Wall Word
9. credible: reliable; proven to be trustworthy.

3. Bell Work N2K Answers
Only one subatomic particle can change when an element becomes an isotope of itself. Next to each subatomic particle, write ‘yes’ next to the one(s) that can change and ‘no’ next to the one(s) that cannot change to make an element an isotope. Justify your answer.
Proton No; a proton gives an element’s identity and cannot change.
Neutron Yes; a neutron can change (subatomic cheeseburger).
Electron No; the number of electrons can change, but this only affects the charge, not whether or not an element becomes an isotope.
Which subatomic particle tells you the name of an element?
Protons
A specific atom of Rubidium has 49 neutrons. What is it’s atomic mass? (Give final answer in amu.)
37 (#of protons) + 49 (#of neutrons) = 86 amu

4. Paper Roulette
Get out a sheet of paper and write your name, date, and period.
Get into our groups (no more than 4 people per group).
Write the name of each person in your group under your name.
We are going to answer questions in our groups during lecture.
I will give you a certain amount of time to answer each set of questions (I will have this printed on each slide).
Each person in the group must answer every question on their own sheet of paper.
At the end of class, I will randomly choose one paper from each group. The paper I choose will determine the grade for everyone in the group, so hold each other accountable for completing the work!

5. How to Find the Atomic Number
What is the atomic number for each of these elements?
Calcium 20

6. How to Find the Atomic Number 2 Minutes!
What is the atomic number for each of these elements?
1. A. Calcium 20
B. Potassium __
C. Krypton __
D. Silicon __
E. Titanium __

7. Remember: # of neutrons
#neutrons = mass number – the atomic number
When using your PT, round decimal numbers to find the most common mass number

8. How to Find the Mass Number
What is the mass number for the most common isotope of each of these elements?
Calcium 40

9. How to Find the Mass Number 3 Minutes!!!
What is the mass number for the most common isotope of each of these elements?
2. A. Calcium 40
B. Potassium __________
C. Krypton __________
D. Silicon __________
E. Titanium __________

10. At this point I need to make this clear:
Change the:
Neutrons and get a  Isotope
Electrons and get an Ion
Neutrons and get a Isotope
Electrons  ION
Neutrons  ISOTOPE

11. Fill in the Blank 1 Minute!
3. If I change the number of neutrons in an element, I get a __________ of that element.

12. Isotope Symbol Notation
There are two different ways to write isotopes.
Symbol Notation –

13. Isotope Symbol Notation 2 Minutes!!!
4. Label the 3 parts of the diagram below.
___________ 
 ___________
___________ 

14. Symbol Notation
Determine the number of protons, electrons, and neutrons in the following neutral atom.

15. Symbol Notation
Write the symbol notation for the average scandium atom.
21 45 𝑆𝑐
Write the symbol notation for a scandium atom with 20 neutrons.
𝟐𝟏 𝟒𝟏 𝑺𝒄

16. Symbol Notation 2 Minutes!
5. Write the symbol notation for the average Rubidium atom.

17. Hyphen-Notation Consists of name of element and a number.
Example: chlorine – 37
Number after name is the mass number.
Determine the number of protons, neutrons, and electrons for a bromine-80 atom.
p=35, e=35, n=35
Write the name of a carbon atom with 7 neutrons in hyphen-notation.
carbon-13

18. Write in symbol and hyphen notation 10 Minutes!
6. a) The average beryllium atom
b) A copper atom with 34 neutrons
c) The average chlorine atom
d) The average hydrogen atom
e) A hydrogen atom with 1 neutron
f) A potassium atom with 22 neutrons
g) A sodium atom with 9 neutrons

19. Turn in your papers!!!