Download history – developing a model of the atom

RHSA SNC1D:Chemistry
Name: _______________
Sub-atomic Particles
Atoms contain three important subatomic particles.
Particle Location Mass Charge
How
Name
determined?
Proton inside the
1
+1
= Atomic
nucleus
Number
Neutron inside the
1
0
= Atomic Mass –
nucleus
Atomic Number
Electron orbiting
nearly
-1
= Atomic Number
outside the
0
nucleus
Standard atomic notation always shows the
atomic mass in the upper left corner above the
element symbol, with the atomic number in the
bottom left corner. For carbon the standard atomic
notation is:
Atomic Mass 
Atomic Number 
12
6
C
RHSA SNC1D:Chemistry
Name: _______________
Modern Model of the Atom
Carbon has 6 protons, 6 neutrons and 6 electrons.
The modern model of the carbon atom looks like:
Let’s try it to put it all together – complete this chart!
Element
beryllium
aluminum
fluorine
Atomic
Mass
Atomic
Number
# of
Protons
# of
Electrons
# of
Neutrons
9
4
4
4
9-4=5
Standard
Atomic
Notation
9
4
Be
RHSA SNC1D:Chemistry
Element
Atomic
Mass
Name: _______________
Atomic
Number
# of
Protons
# of
Electrons
# of Neutrons
Standard
Atomic
Notation
beryllium
9
4
4
4
9-4=5
9
4
aluminum
27
13
13
13
27-13=14
27
13
Al
fluorine
19
9
9
9
19-9-10
19
9
F
Be
RHSA SNC1D:Chemistry
Name: _______________
Sub-atomic Particles
Atoms contain three important subatomic particles.
Particle
Name
Proton
Location
Mass
Charge
How determined?
Neutron
Electron
Standard atomic notation always shows the ______________________in the upper
left corner above the element symbol, with the ______________________ in the bottom
left corner. For carbon the standard atomic notation is:
Atomic Mass 
Atomic Number 
12
6
C
Modern Model of the Atom
Carbon has __________ protons, ________ neutrons and _________ electrons. The
modern model of the carbon atom looks like:
RHSA SNC1D:Chemistry
Name: _______________
Let’s try it to put it all together – complete this chart!
Element
Atomic
Mass
Atomic
Number
# of
Protons
# of
Electrons
# of
Neutrons
beryllium
9
4
4
4
9-4=5
Standard
Atomic
Notation
9
4
Be
aluminum
fluorine
Complete the subatomic particles worksheet.
Complete the worksheet on the history of the development of the modern model of the
atom.
Read p 87 – 89 and do p 89 #2,3
RHSA SNC1D:Chemistry
Name: _______________
Subatomic Particles Worksheet
Element
Symbol
Helium
He
Oxygen
O
Sodium
Atomic
Number
2
Atomic
Mass
4
16
11
Chlorine
# of
Protons
# of Electrons
8
O
17
Calcium
20
7
32
Si
Silver
Ag
Uranium
U
92
6
16
14
Argon
20
4
6
Sulfur
14
40
18
108
47
238
He
16
8
23
C
Standard Atomic
Notation
4
2
35
Li
# of Neutrons
RHSA SNC1D:Chemistry
Name: _______________
HISTORY – DEVELOPING A MODEL OF THE ATOM V2
Read text p 84 –85, 87, 91-92. Write a short point form summary of the important idea or discovery. Sketch the matching diagram.
The ideas are not always presented in order in the textbook.
SCIENTIST
John Dalton
YEAR
Michael
Faraday
DIAGRAM
None
J.J. Thomson
Nagaoka
MOST IMPORTANT IDEA(S) or DISCOVERY
1904
RHSA SNC1D:Chemistry
SCIENTIST
Ernest
Rutherford
YEAR
Niels Bohr
1921
James
Chadwick
Name: _______________
MOST IMPORTANT IDEA(S) or DISCOVERY
DIAGRAM
Conclusion – The Nuclear Model
None