Lewis Structure and Molecular Shapes

What is the correct Lewis Dot Structure for ammonia NH₃?

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Tags

NGSS.HS-PS1-1

According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible?

• Pairs of valence electrons

• Inner shell electrons

• Mobile Electrons

• Electrons closest to the nucleus

Is this molecule symmetrical or asymmetrical?

• Asymmetrical

• Symmetrical

Is this molecule symmetrical or asymmetrical?

• Asymmetrical

• Symmetrical

How many NON BONDING electron domains are around the central atom?

• 0

• 2

• 3

• 4

Tags

NGSS.HS-PS1-2

What molecule below could be polar if it has polar bonds? Think about the symmetry of the molecule.

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Which of the following is the correct Lewis structure for water (H2O)?

• A) H-O-H with two lone pairs on oxygen

• B) H=O=H with no lone pairs

• C) H-O-H with one lone pair on oxygen

• D) H-O-H with three lone pairs on oxygen

Tags

NGSS.HS-PS1-1

What is the molecular shape of carbon dioxide (CO2) according to VSEPR theory?

• A) Bent

• B) Linear

• C) Trigonal Planar

• D) Tetrahedral

Which molecule has a trigonal pyramidal shape?

• A) CH4

• B) NH3

• C) H2O

• D) CO2

In the Lewis structure of sulfur hexafluoride (SF6), how many lone pairs are present on the sulfur atom?

• A) 0

• B) 1

• C) 2

• D) 3