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ATOMIC MODELS PRACTICE-Day 1
Part A-Bohr Models-Directions: Identify the element represented by each Bohr model.
7p
7n
Part B-Lewis Dot Models-Introductions: Lewis Dot Structures are an easy way to represent the valence electrons
of an atom.
Valence electrons are those electrons that are found in the outermost shell (the last shell or energy level) of an atom.
A fast way to determine the number of valence electrons for a given element is to look at the group (within the
periodic table). Within a group, the number of valence electrons remains the same. For example, Hydrogen,
Lithium, and Sodium all have 1 valence electron. Fluorine, Chlorine, and Bromine have 7 valence electrons.
Directions: Fill in the Lewis Dot Structure for each of the elements in the table below.
(Place dots)
1.
2.
Xe
6.
Cs
7.
Rn
11.
4.
Al
8.
Ge
12.
Sr
1.
3.
K
9.
Kr
13.
Ba
5.
10.
Ra
14.
Li
I
S
15.
Br
As
Which elements have the same Lewis dot models and why?
2. Which element on period (row) 6 would have a Lewis dot model represented by and why?
X
Part C-Electron Configurations
Directions: Fill in the electrons for each electron configuration below.
Element
Electron Configuration
Al
1s 2s 2p 3s 3p
K
1s 2s 2p 3s 3p 4s
Br
1s 2s 2p 3s 3p 4s 3d 4p
Directions: Identify the element that is represented by each electron configuration.
Element
Electron Configuration
1s2 2s2 2p4
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s2 3p6 4s2 3d7