formal charge

What is the correct Lewis Dot Structure for ammonia NH3

• 
• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the formal charge for Oxygen

• +1
• -1
• 0
• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the formal charge on the oxygen atom at the top of this Lewis dot structure?

• 0

• -1

• +1

• -3

Based on formal charge, which Lewis structure best represents a sulfuric acid molecule?

• Structure A is the better structure because all of its atoms have a formal charge of zero.

• Structure A is the better structure because NOT all of its atoms have a formal charge of zero.

• Structure B is the better structure because all of its atoms have a formal charge of zero.

• Structure B is the better structure because NOT all of its atoms have a formal charge of zero.

The PF₅ molecule exists, whereas NF₅ does not. Which one of the following is the BEST explanation for this fact?

• Phosphorus can use d orbitals in bonding, whereas nitrogen cannot.

• The first five ionization energies of nitrogen are too high, but those of phosphorus are not.

• Phosphorus has a core charge that must pull over a greater distance due to having a greater number of main energy levels.

• Phosphorus has a lower electronegativity and is, therefore, able to hold a greater number of shared electrons in bonds.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many resonance structure for SO₂ (without expanding the octet)?

• 1

• 2

• 3

• 4

Sulfate ion can be drawn many ways. If you minimize formal charge on S, how many S=O should be drawn?

• 0

• 1

• 2

• 3

• 4

How many valence electrons are available for bonding in the sulfate ion (SO₄^-2)?

• 30 electrons
• 32 electrons
• 28 electrons
• impossible to tell

How many electrons can be used in the Lewis Structure for : NO₃ -

• 23
• 20
• 18
• 24

What is the formal charge on the bromine atom in this Lewis dot structure?

• -1

• +1

• -2

• +2

Tags

NGSS.HS-PS1-2