Bonding lesson 1: valence electrons

Mission

❏Define and explain the importance of valence electrons
❏ Learn how groups have similiar properties

How do atoms
bond together ?

Elements in Group 1 all have 1 valence electron, so they will have similiar properties.

Valence Electrons

​are electrons that in the outermost energy level. They are important because they determine how atoms will act

Now go back to pg 36- we will add valence to your chart

Now, we will add valence to your colored table (pg 36)

Group 1 Alkali metals have 1 valence electron. Place a 1 on top of this column on your periodic table

Now, we will add valence to your colored table (pg 36)

Group 2 Alkaline Earth metals have 2 valence electron. Place a 2 on top of this column on your periodic table

Transition metals are group 3-12 . These have a wide variety of valence numbers and this cannot be known by just looking at the table

Now add valence for Groups 13-18. Use the chart below to help you....

Now, carefully check your work

​Pg 36 Should look like this... check your #'s

Now check your notes carefully

Multiple Choice

What are electrons in the outermost level of atoms called?

• valence electrons

• alkali metals

• alkaline earth metals

• creepy electrons

Multiple Choice

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

• 4

• 3

• 14

• 16

Multiple Choice

How many valence electrons are found in atoms of group 1?

• 7

• 6

• 4

• 1

Multiple Choice

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

Multiple Choice

Which elements have the most similar chemical properties?

• boron and carbon

• oxygen and sulfur

• aluminum and bromine

• argon and silicon

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

When trying to identify an unknown element, a scientist determines what other elements reacts with chemically. Which property of the unknown element determines the other element it reacts with?

• The total number of neutrons in the unknown element

• The total number of particles in the nucleus of the unknown element

• The number of protons in the nucleus of the unknown element

• The number of valence electrons in the unknown element

Multiple Choice

What groups are the most reactive metals?

• 2 and 3

• 1 and 18

• 1 and 2

• 16 and 17

Multiple Choice

• 2

• 8

• 3

• 13

Multiple Choice

• 2

• 3

• 5

Multiple Choice

How many valence electrons does carbon have?

• 4

• 5

• 6

• 7

Multiple Choice

• 12

• 7

• 8

• 14

Multiple Choice

• 7

• 8

• 9

• 10

Multiple Choice

Valence electrons are the...

• Innermost electrons

• Middle electrons

• Outermost electrons

• Any electrons