Valence Electrons and Lewis Diagrams

Which of the following describes a valence electron?

• Outermost from nucleus

• Most energetic

• Determines chemical properties and bonding

• All options

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons are every atom trying to obtain?

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Atoms with few valence electrons (1-3) tend to do what with them?

• Lose them

• Gain more

• Do nothing

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Match the following valance electron trends to their correct response.

• Few valance electrons (1-3)

• Lose them

• 8 valence electrons

• Keep them

• More valence electrons (5-7)

• Lose or Gain

• 4 valence electrons

• Gain them

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

For some elements in groups, how can we determine the number of valence electrons they have just by looking at the periodic table?

• Not possible

• I have no clue

• No consistent way

• The group number they reside in

Tags

NGSS.HS-PS1-1

Match the method of determining valence electrons with the result

• Groups 3-12, Lanthanides/Actinides

• 2 valence electrons

• Helium

• 1 valence electron

• Group 2

• Drop the 1

• Group 1

• 2 valence!

• Groups 13-18

• Look up

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A Lewis Dot Diagram represents

• A single atom of an element

• The number of valence electrons

• The movements of the valence electrons

• All options

Place the steps of making a Lewis Dot Diagram in the correct order

• Place one dot per side initially

• Write element symbol

• Visualize/draw box around symbol

• Determine number of valence electrons

• Add dots up to 2 per side until all are used

Fill in the blanks with all of the elements which could have 3 valence electrons​ (a)   ​ (b)   ​ (c)   ​ (d)   ​ (e)  

• B
• Al
• Ga
• In
• Tl
• Be
• Ge
• Ir
• Ti
• As

Tags

NGSS.HS-PS1-1

Which of the following would have 2 valence electrons

• Alkali metals

• Alkaline earth metals

• Halogens

• Noble Gasses

Tags

NGSS.HS-PS1-1