Valence Number

Valence Electrons

Valence Electrons

• These are the number of electrons found on the outermost energy level

• If you are still confused about valence electrons, watch the 4-minute video which will explain more about valence electrons. You will need to copy and paste the link into another browser tab.

• https://www.youtube.com/watch?v=0hsh0VoFsts

To determine the # of valence electrons we look at the group an element is in.

Groups are the vertical columns within a periodic table. All elements in the same group will have the same number of valence electrons.

Multiple Choice

How many valence electrons does C have?

• 2

• 4

• 12

• 14

Multiple Choice

How many valence electrons does Ca have?

• 2

• 4

• 12

• 14

Multiple Choice

How many valence electrons does Cs have?

• 2

• 55

• 12

• 1

Multiple Choice

Which element has the same number of valence electrons as Cl?

• I

• Ar

• Al

• K

Multiple Choice

Which element has the same number of valence electrons as Kr?

• I

• Ar

• Al

• K

Multiple Choice

Which element has the same number of valence electrons as Na?

• I

• Ar

• Al

• K

Multiple Choice

Which element has the same number of valence electrons as B?

• I

• Ar

• Al

• K

Multiple Choice

Which of the following has 5 valence electrons?

• Na

• Sr

• At

• P

Multiple Choice

Which of the following has 2 valence electrons?

• Na

• Sr

• At

• P

Multiple Choice

What is the name for group 1 elements?

• alkali metals

• alkaline earth metals

• transition metals

• halogens

Multiple Choice

What is the name for group 2 elements?

• alkali metals

• alkaline earth metals

• transition metals

• halogens

Multiple Choice

What is the name for group 17 elements?

• alkali metals

• alkaline earth metals

• transition metals

• halogens

Multiple Choice

Which element is found in period 4 and has 1 valence electron?

• Ba

• Ne

• K

• Ti