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Part A: Atomic Structure. +. Protons. Neutrons. -. Electrons. 5. What element is represented by the diagram? ____________. Boron. Soaps. Glass Manufacturing. Flare Guns. Ceramics. Fiberglass. Part B: Atomic Calculations. 6. Label the information provided in the periodic table. - PowerPoint PPT Presentation
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Part A: Atomic Structure
+
-
Protons
Neutrons
Electrons
5. What element is represented by the diagram? ____________
Boron
Glass Manufacturing Soaps
CeramicsFlare Guns
Fiberglass
Part B: Atomic Calculations
6. Label the information provided in the periodic table.
8
OOxygen
15.999
Atomic Number
SymbolName
Atomic Mass
7.What does the atomic number represent?
Protons
Electrons
What does the atomic mass represent?
Protons
Neutrons +
Atomic Mass
9. How would you figure the number of protons or electrons in an atom?
USE THE ATOMIC NUMBER
8 Atomic Number
10. How would you figure the number of neutrons in an atom?
SUBTRACT THE ATOMIC NUMBER FROM THE ATOMIC MASS
8 Atomic Number
Atomic Mass 15.999
11. Use your knowledge of atomic calculations to complete the chart.
Element Atomic Number
Atomic massProtons + Neutrons
P r o t o n sA t o m i c N u m b e r
NeutronsAtomic Mass – Atomic #
ElectronsAtomic Number
Li 3 7
P 15 31
Cl 35 17
Ni 28 31
K 39 19
Ag 47 61
H 1 1
Si 14 14
W 74 110
Ne 10 10
3 3415 1516
17 1718
28285919 19 20
47 47108
1 0 1
14 1428
74 7418410 1020
Part C: Electron Configuration
12. How many electrons can each level hold?
1st = 2nd = 3rd =
2 8 18
13. What term is used for the electrons in the outermost shell or energy level?
VALENCE
Scientists use two types of diagrams to show the electron configuration for atoms.
Bohr Diagram Lewis Structure
Sulfur • Atomic # = 16 • Atomic Mass = 32 • Protons = • Neutrons = • Electron =
Bohr Diagram Shows all electrons
16
1616
Sulfur Atomic # = 16 Atomic Mass = 32 Protons = 16 Neutrons = 16 Electron = 16
Lewis Structure Shows valence electrons
S
Li
• Atomic Number 3• Mass Number 7• Number of Protons• Number of Neutrons• Number of Electrons
3
34
Li
Ne
• Atomic Number 10• Mass Number 20• Number of Protons• Number of Neutrons• Number of Electrons
10
1010
Ne
Mg
• Atomic Number 12• Mass Number 24• Number of Protons• Number of Neutrons• Number of Electrons
12
1212
Mg
Cl
• Atomic Number 17• Mass Number 35• Number of Protons• Number of Neutrons• Number of Electrons
17
1718
Cl
He
• Atomic Number 2• Mass Number 4• Number of Protons• Number of Neutrons• Number of Electrons
2
22
He
Si
• Atomic Number 14• Mass Number 28• Number of Protons• Number of Neutrons• Number of Electrons
14
1414
Si
(1) Which elements had a filled outermost shell?
(2) Which element would be most likely to lose electrons in a chemical bond?
(3) Which element would be most likely to gain electrons in a chemical bond?
(4) Which elements are not likely to bond with other elements? Why?
He & Ne
Li (Only has 1 valence electron)
Cl (Only needs 1 more electron to fill its outer shell)
He & Ne They have full outer shells.
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