Draw the Lewis structures for each of the following ions or molecules. Identify those in which the octet rule is not obeyed; state which atom in each compound does not follow the octet rule; and state, for those atoms, how many electrons surround these atoms:

$$PH_3$$

Draw the Lewis structure for each molecule. HCl

Draw Lewis structures for the following molecules and ions:

(a) $\mathrm{OF}_2$

(b) $\mathrm{N}_2 \mathrm{~F}_2$

(c) $\mathrm{Si}_2 \mathrm{H}_6$

(d) $\mathrm{OH}^{-}$

(e) $\mathrm{CH}_2 \mathrm{ClCOO}^{-}$

(f) $\mathrm{CH}_3 \mathrm{NH}_3^{+}$

Draw the Lewis structures for each of the fo llowing molecules or ions. Identify in stances where the octet rule is not obeyed; state which atom in each compound does not follow the octet rule; and state how many electrons surround these atoms:

$$BF_3$$

Draw the Lewis structures for each of the following ions or molecules. Identify those in whi ch the octet rule is not obeyed; state which atom in each compound does not follow the octet rule; and state, for those atoms, how many electrons surround these atoms:

$$\mathrm { CH } _ { 2 } \mathrm { Cl } _ { 2 }$$

Write the Lewis structure for each molecule. a. $NF_3$ b. $HBr$ c. $SBr_2$, d $CCl_4$

Draw the Lewis structure for each of the following molecules or ions, and predict their electron-domain and molecular geometries:

$$\mathrm { CH } _ { 3 } ^ { + }$$

Draw Lewis structures (and resonance structures where appropriate) for the following molecules and ions. What similarities and differences are there in this series?\

$$CO _2$$

Draw the Lewis structure for each of the following molecules: a.

$$\mathrm { PCl } _ { 3 }$$

, b.

$$\mathrm { CCl } _ { 2 } \mathrm { F } _ { 2 }$$

, c.

$$\mathrm { CH } _ { 3 } \mathrm { NH } _ { 2 }$$

Draw Lewis structures for each of the following molecules. Show resonance structures, if they exist. a.

$$O_2$$

, b.

$$N_2$$

, c. CO, d.

$$\mathrm { SO } _ { 2 }$$

Draw the Lewis structure for each molecule. $\mathrm{PH}_{3}$

Identify instances where the octet rule is not obeyed:

• NO

• BF$_3$

• ICl$_2^-$

• OPBr$_3$

• XeF$_4$

Draw Lewis structures for each of the following molecules. a. contains one C and four F atoms, b. contains two H and one Se atom, c. contains one N and three I atoms, d. contains one Si and four Br atoms, e. contains one C, one Cl, and three H atoms

All 120 seats in a hall were filled for a concert. The tickets cost $10 for adults and$6 for students. The total proceeds were $980. How many adults attended the concert? How many students?