Question 1

Which of the following best describes the difference between an ionic bond and a covalent bond?

Accepted Answer

An ionic bond involves the transfer of electrons from a metal to a nonmetal, while a covalent bond involves the sharing of electrons between two nonmetals.

Question 2

Given the following electronegativity values: $$\chi_{H} = 2.1$$, $$\chi_{Cl} = 3.0$$, $$\chi_{Na} = 0.9$$, which bond is most likely to be ionic?

Accepted Answer

$$\mathrm{Na-Cl}$$

Question 3

Which of the following statements about bond length is correct?

Accepted Answer

Bond length is the distance between two atoms where the energy is lowest.

Question 4

Which of the following molecules contains a polar covalent bond?

Accepted Answer

$$\mathrm{HCl}$$

Question 5

A molecule of methane ($$\mathrm{CH_4$}) $$can be represented in several ways. Which representation best shows the three-dimensional arrangement of atoms?

Accepted Answer

Ball-and-stick model

Question 6

Which of the following ions is isoelectronic with $$\mathrm{Ne}$$?

Accepted Answer

$$\mathrm{Na^+}$$

Question 7

Which of the following best explains why the $$\mathrm{Na^+}$$ ion is smaller than the neutral $$\mathrm{Na}$$ atom?

Accepted Answer

The $$\mathrm{Na^+}$$ ion has lost an electron, resulting in a smaller electron cloud.

Question 8

Which of the following is the correct Lewis structure for $$\mathrm{NH_3$}$$?

Accepted Answer

N with three single bonds to H and one lone pair on N

Question 9

Which of the following molecules violates the octet rule by having fewer than eight electrons around the central atom?

Accepted Answer

$$\mathrm{BF_3$}$$

Question 10

Which of the following best describes resonance in molecules?

Accepted Answer

Resonance occurs when a molecule can be represented by more than one valid Lewis structure, with atoms connected in the same order.

Question 11

Which of the following is the correct formula for calcium chloride?

Accepted Answer

$$\mathrm{$$CaCl_2$$}$$

Question 12

What is the systematic name for $$\mathrm{Fe(NO_3$)_3}$$?

Accepted Answer

Iron(III) nitrate

Question 13

Which of the following acids is correctly named?

Accepted Answer

$$\mathrm{$$HClO_4$$}$$: Perchloric acid

Question 14

Which of the following best describes the trend in ionic size for the isoelectronic series $$\mathrm{Te$$^{2-}$$}$$, $$\mathrm{I^-}$$, $$\mathrm{Cs^+}$$, $$\mathrm{Ba$$^{2+}$$}$$?

Accepted Answer

Ionic size decreases with increasing nuclear charge.

Question 15

Which of the following compounds contains a Type II cation?

Accepted Answer

$$\mathrm{$$FeCl_2$$}$$

Question 16

Which of the following is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 17

Which of the following best describes the formal charge on the central atom in the nitrate ion ($$\mathrm{NO_3$^-}) $$when using the most stable resonance structure?

Accepted Answer

0

Question 18

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

Accepted Answer

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

Question 19

Which of the following best explains why $$\mathrm{SF_6$}$$ can have more than eight electrons around the central atom?

Accepted Answer

Sulfur is in Period 3 and can use d orbitals to expand its valence shell.

Question 20

Which of the following is the correct name for $$\mathrm{K_2Cr_2O_7}$$?

Accepted Answer

Potassium dichromate

Bonding: General Concepts – Structured Study Notes for General Chemistry

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