What is a valence electron?

• an electron that is found in the outermost shell of an atom. 
• an electron found in the innermost shell of an atom.
• an electron found in the middle shell.

Tags

NGSS.MS-PS1-1

Which of the following has a full valence shell?

• Oxygen

• Helium

• Hydrogen

• Carbon

How many valence electrons in this structure?

• 6
• 5
• 4
• 7

Tags

NGSS.MS-PS1-1

Why are we focusing on the elements H O N C ?

• it's fun to misspell the word honk

• they are the first 4 elements created after the Big Bang

• they are only found on Earth

• they make up the majority of the human body

Why are the atoms attached to Carbon, putting Carbon in the middle of this molecular structure

• Carbon is magnetic

• Carbon has the most mass, thus the most gravitational pull

• Carbon is diamonds

• Carbon can make up to 4 bonds, the most possible

What is the number of valence electrons for Oxygen?

• 8
• 6
• 2
• 1

Tags

NGSS.MS-PS1-1

Atoms "want" / strive to have...

• A full outer shell of electrons

• One electron short of a full shell

• 2 valence electrons

• their time in the sun

Why can't Oxygen add one more Hydrogen to make H₃O?

• Mickey Mouse only has 2 ears

• Hydrogen is very negatively charged

• Oxygen can only form 2 bonds

According to the diagram below, how many bonds will this atom need to make to be stable?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

How many more valence electrons does Oxygen need to be stable?

• 6
• 2
• 4
• It's already stable with 8

Tags

NGSS.MS-PS1-1