Question

1. which of the following molecules would have a trigonal planar vsepr shape? bf₃ color blue h₂o color yellow nf₃ color green

Explanation:

• For \(BF_3\):
• The central atom \(B\) has 3 valence electrons.
• It forms 3 single bonds with \(F\) atoms (\(3\) bonding pairs and \(0\) lone pairs).
• According to VSEPR theory, \(3\) bonding pairs and \(0\) lone pairs around the central atom result in a trigonal planar shape.
• For \(H_2O\):
• The central atom \(O\) has 6 valence electrons.
• It forms 2 single bonds with \(H\) atoms (\(2\) bonding pairs) and has \(2\) lone pairs.
• According to VSEPR theory, \(2\) bonding pairs and \(2\) lone pairs around the central atom result in a bent (V - shaped) shape.
• For \(NF_3\):
• The central atom \(N\) has 5 valence electrons.
• It forms 3 single bonds with \(F\) atoms (\(3\) bonding pairs) and has \(1\) lone pair.
• According to VSEPR theory, \(3\) bonding pairs and \(1\) lone pair around the central atom result in a trigonal pyramidal shape.

Answer:

\(BF_3\) has a trigonal planar VSEPR shape.