Atomic Basics Worksheet Page 4
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1
2
3
4Part C: Electron Configuration
12. How many electrons can each level hold? 1st = 2
2nd = 8
3rd = 18
13. What term is used for the electrons in the outermost shell or energy level? VALENCE
14. Scientists use two types of diagrams to show the electron configuration for atoms. Follow your teacher’s directions
to complete the diagrams.
Bohr Diagram
Lewis Structure
Sulfur
Shows all electrons
Shows valence electrons
Atomic # = 16
Atomic Mass = 32
S
Protons = 16
Neutrons = 16
Electron = 16
15. Calculate the missing information and then draw the Bohr Diagram and Lewis Structure for each element.
Atomic # = 3
Atomic # = 10
Atomic # = 12
Mass # = 7
Mass # = 20
Mass # = 24
# of P = 3
# of P = 10
# of P = 12
# of N = 4
# of N = 10
# of N = 12
# of E = 3
# of E = 10
# of E = 12
Li
Ne
Mg
Atomic # = 17
Atomic # = 2
Atomic # = 14
Mass # = 35
Mass # = 4
Mass # = 28
# of P = 17
# of P = 2
# of P = 14
# of N = 18
# of N = 2
# of N = 14
# of E = 17
# of E = 2
# of E = 14
Cl
He
Si
16. Answer the questions below based on the elements in question #15.
(1) Which elements had a filled outermost shell? He & Ne
(2) Which element would be most likely to lose electrons in a chemical bond? Li (Only has 1 valence electron)
(3) Which element would be most likely to gain electrons in a chemical bond? Cl (Only needs 1 more electron to fill
its outer shell)
(4) Which elements are not likely to bond with other elements? He & Ne Why? They have full outer shells.
T. Trimpe 2007
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