Lewis Dot Diagram Worksheet

Use the Bohr models to determine the number of valance electrons. Once you have found the number of valance electrons, place them around the elements

symbol.

Element

Atomic #

Atomic

Mass

Protons

Neutrons

Electrons

Valance

Electrons

Number

of energy

levels

Bohr Model

Lewis Dot

Carbon

6

12

6

4

(group

14, 4 in

the ones

palace)

2

(2

nd

period)

Hydrogen

1

0

H

Lithium

3

7

3

Li

Element

Atomic #

Atomic

Mass

Protons

Neutrons

Electrons

Valance

Electrons

Number

of energy

levels

Bohr Model

Lewis Dot

Magnesium

12

24

12

Mg

Boron

5

11

5

B

Helium

2

4

2

He

Oxygen

8

16

8

O

Making Ions – Remember that atoms want a filled outer orbital to be in the most stable state. Complete the chart below

showing what happens for each of the atoms to become an ion.

Element

Lewis Dot

# of Valance

e-

Cation or

anion?

Gain/Lose ___

e-

Draw ion

Name of ion

Na

1

Cation

Loses 1

Na

+1

Sodium ion

S

7

Anion

Gains 2

S

-2

Sulfide

Cl

Be

Al

Ne

K

N

O

Ca

P

B

How could you use this pattern to predict how the element may behave in a chemical reaction? _______________

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Describe the pattern of the Lewis dot structures of the first 18 elements (include periods and groups/families)?

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How could you use this pattern to predict how the element may behave in a chemical reaction? _______________

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