Valence electrons and valency

Valence electrons and valency

Valency

Valence electrons are the outer electrons on an atom!

In the picture to the right there are 2 electrons

Open Ended

Define valency and give one example.

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 of these is incorrect?

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 Select

Which ones are acceptable?

Multiple Choice

Is this the correct Lewis Dot Structure for Boron?

Multiple Choice

Is this correct way to draw the Lewis Dot Structure for Carbon?

• Yes

• No, too many electrons

• No, not enough electrons

• No, dots are in wrong places

Multiple Choice

How many valence electrons should Magnesium have in its Lewis dot model?

• 1

• 2

• 3

• 4

Multiple Choice

How many valence electrons in this picture?

• 2

• 8

• 3

• 13

Multiple Choice

How many valence electrons in this picture?

• 2

• 3

• 5

Multiple Choice

How many valence electrons are in this picture?

• 7

• 8

• 9

• 10

Multiple Choice

Valence electrons are the...

• Innermost electrons
• Middle electrons
• Outermost electrons
• Any electrons

Multiple Choice

How many valence electrons does carbon have?

• 4

• 5

• 6

• 7

Multiple Choice

USE THE PERIODIC TABLE

How many valence electrons does sodium have?

• 1

• 2

• 3

• 4

Multiple Choice

USE THE PERIODIC TABLE

How many valence electrons does Phosphorus have?

• 31

• 5

• 15

• 4

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 found in atoms of group 14?

• 4
• 3
• 14
• 16

Multiple Choice

Which group has the greatest number of valence electrons?

• 1

• 14

• 18

• 16

Open Ended

Write the muddiest ( difficult or confusing) point of the topic.