Do and AnswerDraw a Bohr Model for

OxygenHydrogen (twice)

Using the drawing try to draw a Water Molecule.

Define: atom, compound, molecule

Bohr Model

What is a Bohr Model?

• Shows all the protons, neutrons, and electrons contained within an atom.

• Protons and neutrons are drawn in the Nucleus.

• Electrons are drawn on ENERGY LEVELS or SHELLS or ELECTRON CLOUDS (the rings found around the nucleus).

Energy Levels

• Energy levels can only hold a certain amount of electrons.

Energy Level Maximum Number of Electrons

1 2 electrons2 8 electrons3 18 electrons4 32 electrons5 50 electrons

Practice

• Hydrogen

Practice

• Helium

Practice

• Magnesium

Finish the following alone:

• Sulfur• Oxygen• Copper• Francium

How are electrons arranged in Atom?

• Complete for HOMEWORK! • DUE TOMORROW• FRIDAY

Bohr Model Quiz Energy Level Maximum Number of Electrons

1 2 electrons2 8 electrons3 18 electrons

Question 1: Flourine

• Protons = 9• Electrons = 9• Neutrons = 5

Question 2: Magnesium

• Protons = 12• Electrons = 12 • Neutrons = 12

More Practice

• Nitrogen

• Calcium

In your notes:

• Make 3 circle maps for:

Proton

Neutron

Electron

Energy Levels vs. Shells