WorksheetsBohr Models and Lewis Structures
Total questions: 25
Worksheet time: 25mins
What is a Bohr Model?
a simplified representation of an atom
vertical column in periodic table
horizontal row in periodic table
Only shows the element symbol and it's outer most electron shell
Electron live in something called __________.
nucleus
orbits
Shells or Energy levels
Valences
How many electrons can go in the first energy level?
2
8
18
32
This atom has an atomic number of (a) .
This atom has a mass number of (b) .
This atom has (c) valence electrons.
This element is in period (d)
8
16
6
24
2
12
10
3
___________ simplify the Bohr Model by showing only the outer valence electrons used for bonding.
Lewis Dot Diagrams
Bohr Models
Electron Clouds
Periodic Tables
This atom has an atomic number of (a) .
This atom has a mass number of (b) .
This atom has an atomic mass of (c) .
This atom has (d) valence electrons.
8
16
15.999
6
24
2
12
10
3
John is studying chemistry and he comes across a dot diagram for magnesium (Mg). He believes it's correct. Is he right?
true
false
What is a Lewis Dot Structure?
It shows all of the particles in the atom.
Contains protons and neutrons
Only shows the element symbol and it's outer most electron shell
Contains protons and electrons
What is a drawing of an atom that shows all of the par;cles?
Lewis Dot Model
Dalton Model
Thompson Model
Bohr Model
What is the the outermost shell with electrons?
Shells
Isotope
Orbit
Valence
What is the drawing of an atom that only has the symbol and the valence electrons?
Lewis Dot Diagram
Bohr Diagram
Thompson Diagram
Dalton Diagram
How many electrons can go in the Second energy level?
2
8
18
32
What is the atomic number of this element?
17
18
35
35.453
Is this a correct dot diagram for magnesium (Mg)
Yes
No
What is the maximum number of electrons that can occupy the third energy level in a Bohr Model?
8
18
32
50
Which of the following elements would have a Lewis structure with three valence electrons?
Carbon (C)
Nitrogen (N)
Boron (B)
Oxygen (O)
In a Bohr Model, what is the primary difference between the first and second energy levels?
The first level can hold more electrons
The second level is closer to the nucleus
The first level is closer to the nucleus
The second level can hold fewer electrons
Which of the following is true about Lewis Structures?
They show the arrangement of all electrons in an atom
They only show valence electrons
They depict the nucleus and inner electrons
They represent the atomic mass
What is the significance of the valence electrons in a Lewis Structure?
They determine the atomic number
They are involved in chemical bonding
They define the atomic mass
They are located in the nucleus
How many valence electrons does an oxygen atom have in its Lewis Structure?
4
6
8
2
Which of the following elements would have a complete outer shell in its Bohr Model?
Helium (He)
Lithium (Li)
Beryllium (Be)
Boron (B)
In a Bohr Model, what does the term 'energy level' refer to?
The number of protons in the nucleus
The distance of the electron from the nucleus
The number of neutrons in the nucleus
The energy required to remove an electron
What is the main purpose of using a Lewis Dot Structure?
To show the full electron configuration
To illustrate the valence electrons and potential bonds
To display the atomic number
To represent the atomic mass
Which of the following statements is true about the Bohr Model?
It accurately predicts the behavior of all elements
It is only applicable to hydrogen
It shows electrons in fixed orbits
It depicts the nucleus as a cloud
How does the Lewis Structure of a molecule help in predicting its shape?
By showing the total number of electrons
By indicating the number of protons
By illustrating the arrangement of valence electrons
By displaying the atomic mass
