1. 1. What are the 3 subatomic particles? Proton, neutron, and electron
What is an atom?
Catalyst
1. What are the 3 subatomic particles?
Proton, neutron, and electron
2. What are the charges associated with them?
Positive (proton), Neutral (neutron), Negative (electron)
3. Where are they found in the atom?
Nucleus (proton and neutron), Electron cloud (electron)
11/7/11
26L continued

2. Learning Target (Reminder)
11/7/11
What is an atom?
Learning Target (Reminder)
LT #2: I can explain the different parts of an atom and where they are located.
*What is an atom Powerpoint
*Atom animation
26R continued

3. (Heavy/light? Big/small?) (Nucleus or Electron Cloud?)
11/7/11
What is an atom?
Subatomic Particles Table
Complete the table below.
Charge
(+, 0, or -)
Mass/Size
(Heavy/light? Big/small?)
Location
(Nucleus or Electron Cloud?)
Symbol
(p, e, n)
Proton
Neutron
Electron
26R continued

4. (Heavy/light? Big/small?) (Nucleus or Electron Cloud?)
11/7/11
What is an atom?
Subatomic Particles Table
Answers: Copy/correct your answers.
Charge
(+, 0, or -)
Mass/Size
(Heavy/light? Big/small?)
Location
(Nucleus or Electron Cloud?)
Symbol
(p, e, n)
Proton  +
Heavy/big 
 Nucleus p 
Neutron  0 n 
Electron - 
Light/Small 
 Electron Cloud  e
26R continued

5. Learning Target Self-Assess LT #2: Rate yourself on a 3, 2, 1 scale.
11/7/11
What is an atom?
Learning Target Self-Assess
LT #2: Rate yourself on a 3, 2, 1 scale.
3 is “I really know this” and 1 is “I don’t really get it.” Hold up your 3, 2, 1 with your fingers.
26L continued

6. Brainpop Atomic Model:
11/7/11
Atomic Theory
Learning Target #3
LT #3: I can describe the different atomic theories and how they have developed over time.
Brainpop Atomic Model:
27R

7. Read p. 125-128 and fill out the following table:
11/7/11
Atomic Theory
Independent Reading p. 125
Read p and fill out the following table:
Atomic Theory
Explanation/Description
Dalton’s Atomic Theory
Thomson’s Model
Rutherford’s Model
Bohr’s Model
Cloud Model
Modern Atomic Model
27R

8. Atomic Theory 11/7/11 Atomic Theory Explanation/Description
Dalton’s Atomic Theory
All elements are composed of atoms that can’t be divided. Atoms of the same element are exactly alike and have the same mass.
Thomson’s Model
Found that atoms contain negatively charged particles and reasoned that there must be positively charged particles as well.
Rutherford’s Model
Through his experiment, discovered the nucleus of an atom and called the positively charged particles protons.
Bohr’s Model
Added that the electron has specific orbits around the nucleus(like planets around the sun )to Rutherford’s model.
Cloud Model
Electrons do NOT circle the nucleus like planets. Instead, they can be anywhere in a cloudlike region around the nucleus, depending on energy level (electron cloud).
Modern Atomic Model
Neutron discovered in 1930s. At the center of the atom is a tiny, massive nucleus containing protons and neutrons. Surrounding the nucleus is a cloudlike region of moving electrons.
27R

9. Learning Target Self-Assess LT #3: Rate yourself on a 3, 2, 1 scale.
11/7/11
Atomic Theory
Learning Target Self-Assess
LT #3: Rate yourself on a 3, 2, 1 scale.
3 is “I really know this” and 1 is “I don’t really get it.” Hold up your 3, 2, 1 with your fingers.
27L

10. Brainpop Periodic Table:
11/7/11
The Periodic Table
Learning Target #4
LT #4: I can read and understand the periodic table of elements and explain all the different sections.
Brainpop Periodic Table:
28R

11. Vocabulary and Reading
The Periodic Table
Vocabulary and Reading
Write the definitions of the following words, found on p
Atomic number
Isotopes
Mass number
Atomic mass
Periodic table
Period
Group
Chemical symbol
11/7/11
28R

12. 1. What are the periods on the periodic table? What are the groups?
Catalyst
1. What are the periods on the periodic table? What are the groups?
Periods are the horizontal rows and groups are the columns.
2. Define atomic number and atomic mass.
Atomic number is the number of protons and atomic mass is the number of protons and neutrons.
11/9/11
28L

13. Learning Target #4 (Reminder)
11/9/11
The Periodic Table
Learning Target #4 (Reminder)
LT #4: I can read and understand the periodic table of elements and explain all the different sections.
Now, please put everything away except a pencil and a separate sheet of paper.
28R

14. IV. The Periodic Table

15. A. The periodic table is table/chart in which the elements are arranged in the order of increasing atomic numbers.
B. The periodic table was developed by a Russian chemist named Dmitri Mendeleev.

16. C. Reading the periodic table
Number of Electrons in each shell
Atomic number 2 6 8 O
Element symbol
Element name
Oxygen
Atomic mass

18. D. Using to periodic table
Always look at the key for each periodic table used.
1. Atomic number - is the number of protons and electrons for each atom. It is also the order in which the modern periodic table is set up.
2. . Atomic mass- is the sum of the protons and neutrons in an atom.

19. Quick Review! Atomic Mass: Add what two things?
Atomic Number: is the number of what two things?

20. Quick Review! Atomic Mass: Add what two things?
Protons + Neutrons = Atomic Mass
(Remember: Pete and Ned from the Atoms family!)
2. Atomic Number: is the number of what two things?
Protons and Electrons
(Remember: P.E.)

21. E. The Number of Neutrons in an Atom
To find the number of neutrons in an atom use the following formula:
Neutrons= Atomic Mass-Atomic Number
Ex. To find the number of neutrons in a Carbon atom you would subtract the
Atomic Mass (12) - Atomic number (6) this =
6 neutrons

22. Practice finding neutrons!!!
Find the number of neutrons in the following elements:
(Lithium) Li=
(Sodium) Na=
(Potassium) K=

23. Practice finding neutrons
Find the number of neutrons in the following elements:
Li= 6.9(round to 7)-3=
Na= 22.9(round to23)-11=
K= 39.1(round to 39)-19=
Li= 4 neutrons
Na= 12 neutrons
K= 20 neutrons

24. Using the electron rings
Each ring has a set amount of electrons. You cannot over fill a ring but you can under fill a ring. 2e
32e
18e 8e P6 n6 2e p n

25. Electron Ring Practice!!!
Find the electron rings of the following elements. Li K
Hint: Find out how many electrons each element has first! (What can you look at?...)

26. Electron Ring Practice!!!
Find the electron rings of the following elements.
Li =Atomic # 3
K=Atomic # 19 2 1e P3 n4 9e 8e 2e
P19
n20

27. VI. Families and periods
A. The number of rings and number of electrons on the last ring of any given element determines it position on the period table.
B. Groups- vertical columns
*Similar chemical properties

28. C. Each horizontal row on the periodic table is called a period.
*Not alike, but have the same number of energy levels