Miss Fleischer introduces Bohr models, explaining their components and how to draw them. The lesson covers energy levels, electron configuration, and provides examples using helium, lithium, and oxygen. Students learn to identify atomic number, mass, protons, neutrons, and electrons using the periodic table. The video concludes with a practice exercise on drawing a Bohr model for aluminum.

What will you be able to do by the end of the lesson on Bohr models?

• Determine the type of chemical bonds

• Calculate the number of protons in an atom

• Define the energy levels of an atom and identify valence electrons

• Identify the atomic mass of an element

What is the center circle in a Bohr model called?

• Electron cloud

• Energy level

• Proton shell

• Nucleus

How many electrons can the first energy level hold in a Bohr model?

• 32

• 18

• 2

• 8

What is the maximum number of electrons that the second energy level can hold?

• 18

• 8

• 2

• 32

What is the atomic number of oxygen?

• 8

• 16

• 6

• 18

How do you calculate the number of neutrons in an atom?

• Atomic mass plus electrons

• Protons minus electrons

• Atomic mass minus protons

• Atomic number plus protons

How many energy levels are typically drawn for most elements in this lesson?

• 3

• 4

• 2

• 1

How many protons does oxygen have?

• 6

• 16

• 18

• 8

How many electrons does oxygen have in its second energy level?

• 8

• 2

• 4

• 6

What is the atomic mass of oxygen rounded to the nearest whole number?

• 16

• 12

• 8

• 18