Apply VSEPR theory to explain why SiF$_{4}$ is a nonpolar molecule even though it has four polar bonds.

Predict the electron pair geometry, the molecular shape, and the bond angle for a phosphine molecule, PH$_{3}$, using VSEPR theory

Predict the electron pair geometry, the molecular shape, and the bond angle for a nitrogen triiodide molecule, NI$_{3}$, using VSEPR theory

Predict the electron pair geometry, the molecular shape, and the bond angle for a carbon tetrabromide molecule, CBr $_{4}$ ,using VSEPR theory.

Predict the electron pair geometry, the molecular shape, and the bond angle for a silane molecule, SiH$_{4}$ , using VSEPR theory.

Which is longer, the length of a hydrogen bond or a polar covalent bond?

Select the key term that corresponds to the given definition

_____ the simplest representative particle in a substance held together by covalent bonds.

(a) bond angle

(b) bond energy

( c) bond length

(d) bonding electrons

(e) chemical bond

(f) coordinate covalent bond

(g) covalent bond

(h) delta

(d) notation

(i) diatomic molecule

(j) double bond

(k) electron dot formula

(l) electron pair geometry

(m) electronegativity

(n) formula unit

(o) hydrogen bond

(p) ionic bond

(q) molecular shape

(r) molecule

(s) monoatomic ion

(t) nonbonding electrons

(u) nonpolar bond

(v) octet rule

(w) polar bond

(x) polyatomic ion

(y) single bond

(z) structural formula

(aa) triple bond

(bb)valence electrons

(cc) VSEPR theory

Given the values for H ($2.1$) and F ($4.0$), calculate the electronegativity difference in a hydrogen fluoride bond, HF.

(a) $-1.9$

(b) $-6.1$

( c) $1.9$

(d) $6.1$

(e) none of the above

Predict whether each of the following is held together by ionic or covalent bonds.

lead(II) sulfate, PbSO $_{4}$

Predict whether each of the following is held together by ionic or covalent bonds.

iodine heptafluoride, IF $_{7}$

Predict whether each of the following is held together by ionic or covalent bonds.

ammonia, NH $_{3}$

Predict whether each of the following is held together by ionic or covalent bonds.

zinc bromide, ZnBr $_{2}$

Which is greater, the energy to break a hydrogen bond or a polar covalent bond?

Diagram and label the hydrogen bond between two molecules of ammonia, NH$_{3}$