Atomic Basics
Name ___________________________
Part A: Atomic Structure
1. Draw five protons in the nucleus of the atom. Label them with their charge.
2. Draw six neutrons in the nucleus of the atom.
3. Draw two electrons in the first energy level and label them with their charge.
4. Draw three electrons in the second energy level and label them with their charge.
5. What element is represented by the diagram? ____________
Part B: Atomic Calculations
Making Models of Atoms using Bohr Models and Lewis Structures
6. Label the information provided in the periodic table.
Bohr models illustrate________________________________________________________________________.
7. What does the atomic number represent?
8 illustrate_____________________________________________________________________.
Lewis structures
____________________ or ____________________
O
- Valence electrons are _______________________________________________.
8. What does the atomic mass represent?
Oxygen
Groups in
the periodic table show how many _____________________________ are present.
____________________ + ____________________
15.999
Periods in the periodic table show how many _____________________________ are present.
Rules for Energy Levels in Bohr models:
9. How would you figure the number of protons or electrons in an atom?
- Level 1 can hold ______ electrons.
Level you
2 can
holdthe
______
10. How- would
figure
numberelectrons.
of neutrons in an atom?
- Level 3 can hold ______ electrons.
11. Use your knowledge of atomic calculations to complete the chart.
- Level 4 can hold ______ electrons.
Atomic
Protons
* You must fillElement
_________________
before Atomic
going on to draw
the next.
Number
Neutrons
Electrons
Mass
Li
P
1) Draw the ____________________________.
Cl
2) Write the number of _________________________________________________________.
Ni
3) Draw the ____________________________.
K
4) Draw the ____________________________.
Ag
H
How to Draw a Lewis Structure:
Si
1) Write the ____________________________.
W
2) Identify how many ________________________________________________________.
Ne
How to draw a Bohr Diagram:
3) Draw the ____________________________.
- Begin by_______________________________________________________________________________.
T. Trimpe 2007 http://sciencespot.net/
- After completing one round around your ___________________________________ you will then add
Part C: Electron Configuration
1.
12. How many electrons can each level hold? 1st = _____ 2nd = _____ 3rd = _____
2.
13. What term is used for the electrons in the outermost shell or energy level? ____________________
3.
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
Shows all electrons
Sulfur
Atomic # = 16
Lewis Structure
Shows valence electrons
Atomic Mass = 32
S
Protons = ____
Neutrons = ____
Electron = ____
4.
15. Calculate the missing information and then draw the Bohr Diagram and Lewis Structure for each element.
A-
Li
Atomic # = 3
Atomic # = 10
Atomic # = 12
Mass # = 7
Mass # = 20
Mass # = 24
# of P = ____
# of P = ____
# of P = ____
# of N = ____
# of N = ____
# of N = ____
# of E = ____
Ne
# of E = ____
D-
Cl
C-
B-
Mg
E-
# of E = ____
F-
Atomic # = 17
Atomic # = 2
Atomic # = 14
Mass # = 35
Mass # = 4
Mass # = 28
# of P = ____
# of P = ____
# of P = ____
# of N = ____
# of N = ____
# of N = ____
# of E = ____
He
# of E = ____
Si
# of E = ____
16. Answer the questions below based on the elements in question #15.
(1) Which elements had a filled
G- outermost shell? _____ _____
H-
Atomic # = 9
Mass # = 31
Mass # = 19
# =likely
5
(2) Which element wouldAtomic
be most
to lose electrons in a chemical bond? _____
Mass # = 11
I-
Atomic # = 15
(3) Which element would be most likely to gain electrons in a #chemical
bond? _____
of P = _____
# of P = _____
# of P = _____
N = _____
# of N = _____
# oflikely
N = _____
(4) Which elements are not
to bond with other elements?# of_____
_____ Why? _________________________
# of E = _____
# of E = _____
T. Trimpe 2007
http://sciencespot.net/
# of E = _____