Into to valance electrons

Bohr Model Quick Prez & Quizizz

Energy Levels

Poll

How well do you think you know the concept of the Bohr Model?

• Got it down!

• Getting there!

• Not quite sure yet....

• No clue

Bohr Model

• Often referred to as the "planetary" model

• This is because it models the electrons as orbiting the nucleus like the planets orbit the sun.

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AND the possible # of electrons found in each level

2. 8. 18. 32. 32. 18. 2

aren't you glad you only have to know the first 4 levels & the OCTET RULE!!!!

Multiple Choice

How many electrons do the first four energy levels/shells HOLD?

• 2, 8, 8, 16

• 2, 8, 18, 18

• 2, 8, 18, 32

The OCTET (8) Rule-

Atoms tend to form compounds that give them EIGHT valence electrons and thus the electron configuration of a noble gas.

Multiple Choice

What is the OCTET rule in easy words mean?

• energy levels are happy when they have 8 electrons (except the first level, it only needs 2)

• energy levels are happy when they have 18 electrons (except the first level, it only needs 2)

• energy levels are sad when they have 8 electrons (except the first level, it only needs 2)

An exception to an octet 

of electrons is in the case of the first noble gas, helium, which only has two valence electrons.

The VALANCE electrons are the electrons in outer most shell/level/ring.

The VALANCE electrons are REALLY important because

they determine how reactive an element is...

You can determine how many VALENCE electrons atoms have by looking at the group #s of the main electrons

Multiple Choice

What do you need to look at on the PT to determine how many VALANCE ELECTRONS an atom has?

Multiple Choice

Valence electrons are:

• Electrons farthest away from the nucleus

• Electrons closest to the nucleus

• Electrons that just come and go - they don't stay with the atom

• Electrons in the second shell

Multiple Choice

Which group has the greatest number of valence electrons?

• 1

• 14

• 18

• 16

Multiple Choice

How many valence electrons are found in atoms of group 14?

• 4
• 3
• 14
• 16

Multiple Choice

Elements in the same column of the periodic table always have the same # of _______ as one another.

• Protons
• Neutrons
• Electrons
• Valence Electrons

Multiple Choice

How many valence electrons are in this picture?

• 12

• 7

• 8

• 14

Lewis Dot Structures

• Dots represent valence electrons. Place the dots around the element.

• Keep dots separate until you have to double up.

• check your work.

Multiple Choice

Is this the correct Lewis Dot Structure for Boron?

Multiple Select

Which ones are acceptable?