Exceptions to Octet Rule & Resonance Structures

Select the 3 exceptions to octet rule.

• Expanded octet

• Even number electron

• Incomplete octet

• Odd number electron

Molecule that has less than 8 electrons surrounding the central atom is classified as

• even number electron

• odd number electron

• expanded octet

• incomplete octet

Which of the following is true about expanded octets? (Check all that apply.)

• Any element can have an expanded octet.

• Elements in row 3 and lower on the periodic table can have expanded octets.

• An expanded octet is when an element has less than 8 electrons.

• An expanded octet is when an element has more than 8 electrons.

• An expanded octet is when an atom has an unpaired set of electrons in its outer shell.

Do you think Nitrogen at the central already achieved an octet?

• Yes

• No

Tags

NGSS.HS-PS1-1

What type of octet has SF₆ got?

• Achieved octet.

• Incomplete octet.

• Expanded octet.

• Odd number electrons.

Draw the Lewis structure for BH₃ on your own. Then compare your drawing to the answer choices, and select the correct drawing for BH₃.

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Tags

NGSS.HS-PS1-2

Draw the Lewis structure for BeI₂. Then compare your drawing to the answer choices, and select the correct answer choice.

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Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

This Lewis structure ________________________.

• follows the octet rule.

• is an incomplete octet.

• is an expanded octet.

• is a free radical.

Tags

NGSS.HS-PS1-2

What is the name for when more than one valid Lewis structure can be drawn for a molecule?

• coordinate covalent bond

• resonance

• endothermic

• structural formula

What is the picture showing?

• All of the resonance structures for carbonate.

• The formal charge on each atom in carbonate.

• The electronegativity for carbonate.

• The ionization energy for carbonate.

Tags

NGSS.HS-PS1-3