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Bonds/IMF
Molecular Shapes
Molecular Shapes II
Vocab
Lewis Dot and Exceptions
100
Electrons are shared to reach an octet
Covalent bonds
100
Molecular shape that has 2 bond pairs and no lone pairs
Linear
100
The shape of H2O
Bent
100
A positively charged ion made when an atom loses one or more valence electron
Cation
100

Which of the following should be the central atom in CHClO?

  1. C

  2. H

  3. Cl

  4. O

Carbon

200
The positive end of one molecule is attracted to the negative end of another
Dipole-dipole
200
2 bond pairs and 2 lone pairs
Bent
200
The shape of CO2
Linear
200
The electrons in the highest occupied energy level of an atom
Valence electrons
200

What is the best explanation for why S can form an expanded octet, but N can’t?

S can access d-orbitals, but N can’t.

300
Electrons are transferred to reach an octet
Ionic bond
300
3 bond pairs and no lone pairs
Trigonal planar
300
The shape of CH4
Tetrehedral
300

Which of the following is the best definition of lattice energy?

  1. A measure of an ionic bond’s strength

  2. The energy required to remove an electron from an atom

  3. The energy released when an electron is added to an atom

  4. The attraction an atom has for electrons in a bond

1.

300

Draw Lewis Structures for the following molecules: SF2 and HCN

S should have 2 lone pairs

C and N should be triple bonded

400
Occurs between molecules that have H bonded to N, O, or F
Hydrogen bond
400
Four bond pairs and no lone pairs
Tetrahedral
400
The shape of NH3
Pyramidal
400
The abbreviation is VSEPR
Valence Shell Electron Pair Repulsion
400

Explain resonance and provide an example.

NO2- is one, the double bond could be on either oxygen atom

500
Movement of electrons cause one molecule to become temporarily polar and cause other molecules to turn polar
van der Waals
500
Three bond pairs and one lone pair
Pyramidal
500
The shape of CH2O
Trigonal Planar
500
One or more equally valid electron dot structures for a molecule
Resonance structures
500

Why doesn't NCl5 exist?

N can not access the D orbital