Deck 2: Molecules, Ions, and Chemical Formulas

Question 1

Which of the following compounds has only covalent bonding?

A) H₂O
B) NaOH
C) NaCl
D) Al₂(SO₃)₃
E) Fe₂O₃

Answer 1

H₂O

Question 2

Cl^- is a(n) _____ ion.

Answer 2

monoatomic

Question 3

Differentiate between organic and inorganic compounds.

Answer 3

Covalent compounds that contain predominantly carbon and hydrogen are called organic compounds. Compounds that consist primarily of elements other than carbon and hydrogen are called inorganic compounds; they include both covalent and ionic compounds.

Question 4

Which of the following is an elemental-polyatomic molecule?

A) Carbon tetrachloride
B) Nitrogen
C) Phosphorous
D) Sodium chloride
E) Chlorine

Question 5

How many electrons are shared between two atoms joined by a double bond?

A) One
B) Two
C) Four
D) Six
E) Eight

Question 6

In a(n) _____, the atoms are held together by the electrostatic attraction between the positively charged nuclei of the bonded atoms and the negatively charged electrons they share.

Question 7

In an ionic bond, the atoms are held together by the electrostatic attraction between the positively charged nuclei of the bonded atoms and the negatively charged electrons they share.

Question 8

What is a chemical bond? Briefly describe the types of chemical bonds.

Question 9

If two charged particles, Q₁ and Q₂, are separated by the distance r, the electrostatic energy between the particles is $\infty$ _____

A) Q₁× Q₂ + r
B) Q₁× Q₂× r
C) $\frac { r ^ { 2 } } { Q _ { 1 } \times Q _ { 2 } }$
D) $\underline { Q _ { 1 } Q _ { 2 } }$
$r$
E) $\frac { r } { Q _ { 1 } \times Q _ { 2 } }$

Question 10

Methane (CH₄) is a covalent molecule, where electrons are shared between the carbon and hydrogen atoms.

Question 11

Each covalent compound is represented by a(n) _____ , which gives the atomic symbol for each component element, in a prescribed order, accompanied by a subscript indicating the number of atoms of that element in the molecule.

Question 12

Which of the following is an organic compound?

A) FeO
B) NaHCO₃
C) CH₄
D) SF₆
E) H₂CO₃

Question 13

Which method of representing the structure of a molecule uses wedges and dashes to sketch the structure of a molecule in three dimensions?

A) Ball-and-stick model
B) Perspective drawing
C) Space filling model
D) Condensed structural formula
E) Molecular formula

Question 14

Which of the following molecules has a tetrahedral geometry?

A) H₂O
B) CO₂
C) CH₄
D) NO₂
E) NH₃

Question 15

Ions that contain more electrons than protons have a net negative charge and are called _____.

Question 16

The most common monoatomic ion formed by magnesium is _____.

A) Mg^-
B) Mg^2-
C) Mg³⁺
D) Mg²⁺
E) Mg^3-

Question 17

There is a triple bond between the two oxygen atoms in a molecule of O₂.

Question 18

A Ca²⁺ ion has the same number of electrons as the noble gas Argon.

Question 19

What is the total number of electrons present in an Mg²⁺ ion?

A) 8
B) 10
C) 12
D) 14
E) 16

Question 20

Ions that contain fewer electrons than protons have a net positive charge and are called anions.

Question 21

The thiocyanate ion (SCN^-) is an example of a polyatomic anion.

Question 22

Which of the following is the compound formed from the ions NH₄⁺ and NO₃^-?

A) N₂O₂H₂
B) HNO₃
C) NO₄NH₃
D) NH₃NO₄
E) NH₄NO₃

Question 23

_____ are compounds that contain specific ratios of loosely bound water molecules.

Question 24

HSO₄^- is an example of a polyatomic _____.

Question 25

A dichromate ion, Cr₂O₇²⁻, will react with _____ potassium ions to form potassium dichromate.

Question 26

Which of the following is the formula of the polyatomic ion peroxide?

A) $\mathrm { O } _ { 2 } ^ { 2 - }$

B) $\mathrm { CN } ^ { - }$

C) $\mathrm { HPO } _ { 4 } ^ { 2 - }$

D) $\mathrm { HPO } _ { 4 } ^ { 2 - }$ .

E) $\mathrm { HPO } _ { 3 } ^ { 2 - }$

Question 27

The compound formed from Fe³⁺ and O^2- is_____.

A) FeO
B) Fe₂O
C) FeO₂
D) FeO₃
E) Fe₂O₃

Question 28

What are polyatomic ions? Give an example of a polyatomic anion and a polyatomic cation.

Question 29

The _____ of a compound is the relative number of atoms of the elements in a compound, reduced to the smallest whole numbers.

Question 30

An ionic compound that contains only two elements, one present as a cation and one as an anion, is called a(n) _____.

Question 31

Sodium oxide (Na₂O) is a binary ionic compound.

Question 32

Which of the following is the compound formed from the ions Pb²⁺ and S^2-?

A) PbS
B) Pb₂S
C) PbS₂
D) 2Pb₂S
E) Pb₂S₂

Question 33

The ion pair Na⁺ and SO₄^2- forms the compound Na₄SO.

Question 34

Which of the following is the compound formed from the ions Cu⁺ and O^2-?

A) CuO
B) Cu₂O
C) CuO₂
D) CuO₃
E) Cu₂O₃

Question 35

The systematic name for cuprous chloride is copper (II) chloride.

Question 36

Two chlorine ions react with one chromium (II) ion to form chromic chloride.

Question 37

The empirical formula for the compound formed from an aluminum ion and a sulfate ion is _____.

A) AlSO₄
B) Al(SO₄)₂
C) Al₂SO₄
D) (AlSO₄)₂
E) Al₂(SO₄)₃

Question 38

Chlorine with atomic number 17 would most likely _____ an electron, during ionic bonding, to attain the noble gas configuration of Argon.

Question 39

The formula unit of a compound is the relative numbers of atoms of the elements in a compound, reduced to the smallest whole numbers.

Question 40

The dichromate ion (Cr₂O₇^-) is an example of a polyatomic cation.

Question 41

The ion $\mathrm { Cr } _ { 2 } \mathrm { O } _ { 7 } ^ { 2 - }$ is called _____.

A) per chromate
B) chromite
C) chromium oxate
D) chromate
E) dichromate

Question 42

What is the systematic name for FeS?

A) Ferric sulfide
B) Iron(I) sulfide
C) Iron (II) sulfide
D) Ferrous sulfide
E) Iron (III) sulfide

Question 43

The systematic name of Mg(HCO₃)₂ is _____.

A) magnesium carbonate
B) magnesium bicarbonate
C) magnesium formate
D) magnesium acetate
E) manganese (II) bicarbonate

Question 44

The systematic name for OF₂ is oxygen difluoride.

Question 45

Cyclohexane is a saturated hydrocarbon.

Question 46

Explain the different conventions involved in naming a polyatomic anion?

Question 47

(NH₄)₂SO₄ is called _____ in the systematic nomenclature.

Question 48

The common or old name for iron (II) sulfide is _____.

Question 49

Polyatomic anions that contain a single metal or nonmetal atom plus one or more oxygen atoms are called _____.

Question 50

Cyclopropane has four carbon atoms in its structure.

Question 51

The formula for the sulfite ion is _____.

A) $\mathrm { SO } _ { 3 } ^ { 2 - }$
B) $\mathrm { SO } _ { 4 } ^ { 2 - }$
C) $\mathrm { SO } _ { 2 } ^ { - }$
D) $\mathrm { SO } _ { 2 } ^ { 3 - }$
E) $\mathrm { SO } _ { 2 } ^ { 4 - }$

Question 52

NaClO₄ is referred to as sodium hypochlorite.

Question 53

The common name for the compound Fe₂(SO₄)₃ is _____.

A) iron sulfate
B) ferric sulfate
C) iron-two sulfate
D) ferrous sulfate
E) iron-three sulfate

Question 54

NaC₂H₃O₂ is called sodium acetate.

Question 55

The formula for calcium formate is ____.

Question 56

The formula for sodium bicarbonate is _____.

A) NaCO₂
B) Na₂CO₃
C) Na₂HCO₃
D) NaHCO₃
E) Na₂(CO₃)₂

Question 57

C₆H₅CH₂OH is the condensed molecular formula of phenol.

Question 58

The formula of nitrogen dioxide is N₂O₂.

Question 59

What is the systematic name of NH₄ClO₄?

A) Chlorine nitride
B) Ammonium chlorate
C) Ammonium chloride
D) Chlorammonium hydride
E) Ammonium perchlorate

Question 60

The formula for aluminum sulfite is _____.

A) AlSO₃
B) Al₂(SO₃)₂
C) Al₂(SO₄)₃
D) Al₃(SO₃)₂
E) Al₂(SO₃)₃

Question 61

The molecular formula for cyclobutane is _____.

Question 62

Which of the following is the formula of niobium (IV) oxide?

A) Nb₄O
B) Ni₄O
C) NO₂
D) N₂O₂
E) NbO₂

Question 63

Which of the following is the condensed structural formula for isobutane?

A) CH₃CH₂CH₂CH₃.
B) CH₃CH₃CH₂CH₂
C) CH₃CH₂CH₂CH₃
D) (CH₃)₃CH₂
E) (CH₃)₂CHCH₃

Question 64

Calcium oxide when dissolved in water results in a basic solution.

Question 65

Sulfuric acid is an example of an oxoacid.

Question 66

What is the name of RbS?

A) Sulfo rhenium
B) Rhodium sulfide
C) Sulfo ruthenium
D) Ruthenium sulfide
E) Rubidium sulfide

Question 67

HClO is the formula of perchloric acid.

Question 68

The formula of copper (I) oxide is _____.

A) CuO
B) Cu₂O
C) Co₂O₂
D) Cu₃O₂
E) CoO

Question 69

CH₃CH₂CH₂CH₂CH₃ is called _____.

Question 70

What is the name of CH₃C≡CCH₃?

A) 2-butane
B) 2-butene
C) 2-pentene
D) 2-butyne
E) 2-cyclobutane

Question 71

Which of the following is the structure of toluene?

A)

B)

C)

D)

E)

Question 72

Briefly describe the four major classes of hydrocarbons. What are saturated and unsaturated hydrocarbons?

Question 73

Unsaturated hydrocarbons are those which contain multiple bonds such as alkenes and _____.

Question 74

What is the name of Tl₂Se?

A) Titanium (II) sulfate
B) Titanium (I) sulfite
C) Terillium (II) selenide
D) Thallium (I) selenide
E) Tungsten (II) sulfide

Question 75

Which of the following is the structure of cyclobutane?

A)

B)

C)

D)

E)

Question 76

_____ are the simplest class of organic compounds, consisting entirely of carbon and hydrogen.

Question 77

Chlorous acid is the acid formed by adding one proton to the chlorite ion (ClO₂⁻).

Question 78

What are cyclic hydrocarbons? Give examples of cyclic hydrocarbons. Explain how to draw cyclic hydrocarbons.

Question 79

Which of the following is the simplest alkene?

A) C₂H₆
B) C₆H₆
C) C₂H₄
D) C₂H₂
E) C₆H₁₂

Question 80

The molecular formula of ethanol is _____.