Bohr Models

The Bohr Model

LQ: How many energy levels does an
atom of F have? How do you know?

Quick Review

What is an electron?
What charge does it have?
Where are they located in the atom?

Multiple Choice

Where are electrons located in an atom?

• Inside the nucleus

• Outside the nucleus

• Near the protons

• Next to the neutrons

Atomic Models

The Bohr Model

Electrons ONLY exist at these
levels, not in between.

– We call these levels “SHELLS ”

• Shells = period

The Bohr Model says that electrons exist in
very specific energy levels surrounding the

nucleus.

Multiple Choice

How are electrons arranged in an atom?

• In groups of five
• In energy levels
• By color
• By shape

● The period (row) number tells us how many shells

● We can use the periodic table to predict how many

energy levels or shells an atom’s Bohr model will have.

The Bohr Model

Multiple Choice

On the periodic table, Groups are

• Horizontal rows

• Vertical columns

Multiple Choice

On the periodic table, Periods are

• Horizontal rows

• Vertical columns

Each shell can only hold a certain number of electrons

The Bohr Model

Electron Shell

Max # e-

1

2

2

8

3

18

4-7

18-32

Multiple Choice

The innermost energy level has a maximum of how many electrons?

• 1

• 2

• 6

• 8

Multiple Choice

The second energy level has a maximum of how many electrons?

• 1

• 2

• 6

• 8

Multiple Choice

The third energy level has a maximum of how many electrons?

• 2

• 6

• 8

• 18

Poll

I have watched the following video on how to draw a Bohr Model:

https://www.youtube.com/watch?v=Q71vwWYE1_0

• Yes I watched the video

• No I didn't need to because I understand

Multiple Choice

Which Bohr model represents Neon?

Multiple Choice

Which element does this Bohr model represent?

• Aluminum

• Silicon

• Magnesium

• Cobalt

Multiple Choice

What element does this Bohr model represent?

• Chromium

• Magnesium

• Carbon

• Krypton

Multiple Choice

What is the name of this element?

• Lithium
• Boron
• Carbon
• Neon

Multiple Choice

What element is represented in this Bohr Model?

• Carbon

• Hydrogen

• Aluminum

• Lithium

Multiple Choice

What is this element?

• Beryllium (atomic #4)

• Boron (atomic #5)

• Carbon (atomic #6)

• Nitrogen (atomic #7)

Multiple Choice

Name this element.

• Neon

• Magnesium

• Sodium

• Manganese

Multiple Choice

Which Bohr model represents Neon?

Multiple Choice

What element is this?

• Nitrogen

• Chlorine

• Argon

• Phosphorous

Multiple Choice

What element is this?

• P

• F

• B

• Mg

Multiple Choice

Which Bohr model represents Be?

Multiple Choice

How many electrons does this element have?

• 12

• 11

• 13

• 10

Multiple Choice

How many energy levels does this element have?

• 1

• 2

• 3

• 4

Multiple Choice

Which Bohr model represents Oxygen?

Multiple Choice

Is this the correct Bohr model for carbon (C)?

• Yes

• No

Multiple Choice

What element is this the Bohr model of?

• Fluorine (F)

• Potassium (K)

• Aluminum (Al)

• Boron (B)

Multiple Choice

What is the atomic number of this atom?

• 2

• 4

• 6

• 8

Multiple Choice

What is the mass number of this atom?

• 1

• 3

• 4

• 7

The Bohr Model

Valence Electrons:

electrons in the outermost

shell

Elements in the same group
act the same chemically

because they have the same

number of valence

electrons!

Multiple Choice

What is a valence electron?

• Electrons in the first energy shell

• Electrons in the second energy shell

• Electrons in the outer shell

• Total number of electrons

Multiple Choice

How many valence electrons?

• 2

• 4

• 6

• 8

Multiple Choice

How many valence electrons?

• 2

• 3

• 4

• 5

Multiple Choice

How many valence electrons?

• 2

• 3

• 4

• 5

Multiple Choice

What group does this element belong to?

• 1

• 2

• 17

• 18

Multiple Choice

Which element will have the most similar physical and chemical properties to the element Sulfur (S)?

• Carbon

• Neon

• Phosphorus

• Hydrogen

• Oxygen

Multiple Choice

Which element will have the most similar physical and chemical properties to the element Barium (Ba)?

• Caesium

• Strontium

• Astatine

• Lanthanum

• Oxygen

Multiple Choice

Elements in a ..................have similar chemical properties.  

• period
• group
• row