1. Catalyst (4 min) - What is the name of the isotope below?
Why is this atom neutral? + -

2. - What is the name of the isotope below? Why is this atom neutral?
Element – Mass#
4 protons  Beryllium
Mass# = 4p + 5n = 9
Isotope Name: Beryllium-9
Why is this atom neutral?
same # protons and electrons
Opposite charges (+/-)
The charges cancel out!
NOTE: QUIZ TOMORROW! + -

3. Announcements:
Quiz TOMORROW!
Homework due Monday (11/1/10)

4. What’s on the quiz:
Know the names, charges, masses and locations in the atom of the three subatomic particles
Draw atoms – correct number of protons, neutrons and electrons in the correct places
Be able to determine the number of protons, neutrons and electrons in the atom
Be able to name isotopes

5. Atomic Structure and Isotopes Review

6. How the Game Works… Question on the screen Work with your groups
To get the point
Board in the air on time
Correct answer
Team with the most points WINS (HW Pass)
Points off:
Cheating
Lack of participation
Whining/ Arguing
Disrespectful language/behavior

7. Question #1
What is the smallest unit of an element that retains the identity of the element?
The ATOM!

8. Question #2
What subatomic particle has no charge and where is it located? + -
Neutron
In the nucleus

9. Question #3
An element has 9 protons, 10 neutrons and 9 electrons. What element is the atom?
9 protons
FLUORINE!

10. 11 # protons = # electrons Question #4
If an atom has 11 protons, how many electrons does it have? 11
# protons = # electrons

11. Protons (+) and electrons (-) have opposite charges
Question #5
Why do atoms have a neutral charge overall even though they are made of charged particles?
#protons = # electrons
Protons (+) and electrons (-) have opposite charges
The charges cancel out!

12. Question #6
If an atom has 5 protons, 5 electrons and 7 neutrons, what is the atomic mass of the atom?
Mass = #p + #n
Mass = 5 + 7
Mass = 12

13. Question #7
What is the name of the isotope with 6 protons, 7 neutrons, and 6 electrons?
Element name?
Carbon
Mass number?
6 + 7 = 13
Carbon-13

14. All scientists use the same symbols
Question #8
What are two reasons why scientists use symbols to represent the different elements?
Easier to write
All scientists use the same symbols

15. Protons and electrons have charges
Question #9
How many charged particles are in one sodium (Na) atom? (Hint: which particles are charged?)
Protons and electrons have charges
11 protons + 11 electrons
22 charged particles!

16. Question #10
What is the element symbol of an atom with 19 protons and 17 neutrons?
Atomic # = 19
Potassium K

17. Question #11
What is the name of an isotope with 19 protons and 17 neutrons?
Element?
Potassium
Mass Number?
= 36
Potassium-36

18. Question #12
An atom has a mass number of 15 and 9 protons. How many neutrons does the atom have?
Mass number = #p + # n
15 = 9 + # n
6 = # n

19. Question #13
The atomic number of an atom is 8 and the atomic mass is 14. How many protons, electrons and neutrons are in the atom?
Atomic # = # protons
8 protons!
# protons = # electrons
8 electrons!
Mass number = #p + #n
14 = 8 + #n
6 neutrons!

20. Question #14
What is the element symbol of an atom with a mass number of 27 and 11 neutrons?
Mass number = #p + #n
27 = #p + 11
#p =
#p = atomic # = 116
Sulfur S

21. Question #15 - Neon-15 - What is the name of the isotope below?
10 protons
5 neutrons
Neon-15 - + -

22. Question #16 - - - - What is the atomic number of the atom below?
What is the mass number of the atom below?
mass number = 15 - - + + + + + + + + - + + -