Question 1

Which of the following best describes the process by which sodium and chlorine form an ionic bond in sodium chloride (NaCl)?

Accepted Answer

Sodium loses an electron to become Na$$^+$$, chlorine gains an electron to become Cl$$^-$$, and the resulting ions are held together by electrostatic attraction.

Question 2

Which of the following compounds would you expect to have the highest lattice energy based on the charges and sizes of the ions involved?

Accepted Answer

MgO

Question 3

Which of the following statements about electronegativity is correct?

Accepted Answer

Electronegativity is the ability of an atom to attract electrons in a chemical bond.

Question 4

Which of the following bonds is most likely to be considered ionic based on the difference in electronegativity?

Accepted Answer

Na–F

Question 5

What is the correct formula for a compound formed between aluminum ions (Al$$^{3+}) $$and oxide ions (O$$^{2-}$$)?

Accepted Answer

$$\mathrm{Al_2O_3}$$

Question 6

Which of the following best explains why CO$$_2 is a $$nonpolar molecule even though it contains polar bonds?

Accepted Answer

The molecule is linear, and the bond dipoles cancel each other out.

Question 7

Which of the following is the correct Lewis dot symbol for a sulfide ion (S$$^{2-}$$)?

Accepted Answer

S with 8 dots and a $$2-$$ charge

Question 8

Which of the following molecules has a trigonal planar molecular geometry?

Accepted Answer

BF$$_3$$

Question 9

What is the bond angle in a molecule with a tetrahedral electron-domain geometry?

Accepted Answer

$$109.5^\circ$$

Question 10

Which of the following compounds is named correctly according to IUPAC rules?

Accepted Answer

Na$$_2SO$_4$$: sodium sulfate

Question 11

Which of the following molecules is expected to have a dipole moment?

Accepted Answer

H$$_2O$$

Question 12

Which of the following intermolecular forces is the strongest?

Accepted Answer

Ion-ion interactions

Question 13

Which of the following best describes the geometry and bond angles of ammonia (NH$$_3$$)?

Accepted Answer

Trigonal pyramidal, $$107^\circ$$

Question 14

Which of the following is the correct name for H$$_2SO$_4$$?

Accepted Answer

Sulfuric acid

Question 15

Which of the following statements about resonance structures is correct?

Accepted Answer

Resonance structures differ only in the arrangement of electrons.

Question 16

Which of the following molecules is expected to have the highest boiling point?

Accepted Answer

C$$_8H$_{18}$$

Question 17

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Question 18

Which of the following is a correct statement about the octet rule?

Accepted Answer

Elements in the third period and beyond can have more than eight valence electrons.

Question 19

Which of the following best describes the molecular geometry of SF$$_6$$?

Accepted Answer

Octahedral

Question 20

Which of the following is the correct systematic name for Mn$$_2S$_3$$?

Accepted Answer

Manganese(III) sulfide

Chemical Bonding and Molecular Geometry: General Chemistry Study Notes

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