Deck 3: Ionic Compounds

Question 1

Which is not a covalent compound?

A)Br₂
B)NO₂
C)NH₃
D)NaNO₂
E)More than one of the compounds above is not a covalent compound.

Answer 1

D

Question 2

In bonding, main group elements _____ to attain the electronic configuration of the noble gas closest to them in the periodic table.

A)gain electrons
B)lose electrons
C)share electrons
D)gain, lose, or share electrons

Answer 2

D

Question 3

Which is not an ionic compound?

A)KCl
B)Ca(NO₃)₂
C)CBr₄
D)AlBr₃

Answer 3

C

Question 4

What is the formula for the ionic compound formed when aluminum and sulfur combine?

A)AlS
B)Al₂S₃
C)AlS₃
D)Al₂S
E)Al₃S₂

Question 5

_____ are negatively charged ions that have _____ electrons than protons.

A)Anions, more
B)Cations, more
C)Anions, less
D)Cations, less

Question 6

What is the formula for the ionic compound formed when magnesium and oxygen combine?

A)MgO
B)MgO₂
C)Mg₂O
D)Mg₂O₂

Question 7

What is the symbol for the ion formed by magnesium?

A)Mg^2-
B)Mg³⁺
C)Mg²⁺
D)Mg^4-

Question 8

Which element has a variable charge?

A)Na
B)Fe
C)Al
D)C

Question 9

What is the ion symbol of the oxide ion?

A)O^2-
B)O₂^2-
C)O₂
D)O²⁺
E)O^6-

Question 10

What is the formula for the ionic compound formed when potassium and bromine combine?

A)PBr
B)KBr
C)KBr₂
D)K₂Br
E)K₇Br

Question 11

What is the formula for the ionic compound lithium oxide?

A)LiO
B)LiO₂
C)Li₂O
D)Li₂O₂

Question 12

What is the electron configuration of an F^- ion?

A)1s²2s²2p⁴
B)1s²2s²2p⁵
C)1s²2s²2p⁶
D)1s²2s²2p⁶3s¹

Question 13

What is the ion symbol for an atom with twenty (20)protons and eighteen (18)electrons?

A)Ca
B)Ca²⁺
C)Ar
D)Ar²⁺
E)Ar^2-

Question 14

When forming ions, metals typically do which of the following?

A)lose electrons to form negatively charged ions
B)gain protons to form cations
C)gain electrons to form anions
D)lose electrons to form positively charged ions

Question 15

How many protons and electrons are present in Co²⁺?

A)27 protons, 27 electrons
B)27 protons, 29 electrons
C)27 protons, 25 electrons
D)29 protons, 27 electrons

Question 16

What is the charge of the ions formed by group 7A elements?

A)+1
B)+7
C)-1
D)-7

Question 17

What is the ion symbol for an atom with sixteen (16)protons and eighteen (18)electrons?

A)S^2-
B)S
C)Ar
D)Ar²⁺
E)Ar^2-

Question 18

Which statement concerning the ion Li⁺ is correct?

A)Li⁺ has two total electrons.
B)Li⁺ has an octet of electrons in its valence shell.
C)Li⁺ is formed when a lithium atom gains one electron.
D)Li⁺ is formed when a lithium atom gains one proton.

Question 19

Which statement best explains the basis for the octet rule?

A)Atoms are most stable when they have eight bonds.
B)Atoms lose, gain, or share electrons to become a stable, noble gas.
C)Atoms are most stable with eight protons in their nucleus.
D)Atoms are most stable with eight electrons in their valence shell and the electron configuration of a noble gas.

Question 20

Which pair of elements will form an ionic compound?

A)sulfur and oxygen
B)copper and iron
C)iron and chlorine
D)bromine and oxygen

Question 21

If atoms with the electron-dot symbols shown below are combined, what is the formula of the ionic compound that is formed?

A)XY
B)X₂Y
C)XY₂
D)X₂Y₂
E)X₃Y₂

Question 22

Which atom fits the electron-dot symbol shown below?

A)Li
B)B
C)N
D)Na

Question 23

What is the formula for chromous cyanide?

A)CrCN
B)Cr(CN)₂
C)Cr(CN)₃
D)Cr₂CN

Question 24

What period 4 element forms an ion with a -1 charge?

A)sulfur
B)bromine
C)iodine
D)rubidium
E)potassium

Question 25

What is the name of the SO₄^2- ion?

A)sulfide ion
B)sulfate ion
C)sulfite ion
D)bisulfate ion

Question 26

What is the chemical formula for the ionic compound calcium selenide?

A)Ca₂Se₂
B)CaSe
C)CaSe₂
D)Ca₂Se

Question 27

The correct name for Ag₂O is _____.

A)silver (II)oxide
B)silver (I)oxide
C)silver oxide
D)disilver oxide

Question 28

What is the charge on the chromium ion in the ionic compound CrCl₃?

A)+6
B)+3
C)-3
D)-6
E)Not enough information is given to determine the charge.

Question 29

Which compound has the highest melting point?

A)KCl
B)CH₄
C)C₆H₁₂O₆
D)H₂O

Question 30

What is the chemical formula of tin (IV)cyanide?

A)Sn₄CN
B)SnCN₄
C)Sn(CN)₄
D)SnC₄N₄

Question 31

If atoms with the electron-dot symbols shown below are combined, what is the formula of the ionic compound that is formed?

A)XY
B)X₂Y
C)XY₂
D)X₂Y₂
E)X₃Y₂

Question 32

An atom has the electron-dot symbol shown below. If this atom is a main group element, what charge will it form in its ionic state?

A)-1
B)+3
C)-5
D)-3

Question 33

What is the formula for the ionic compound formed from the lead (II)ion and the carbonate ion?

A)Pb(CO₃)₂
B)PbCO₃
C)Pb₂CO₃
D)PbCO₄

Question 34

Which chemical formula is correct?

A)Ag(CH₃CO₂)₂
B)K₂CN
C)Mg(OH)₂
D)MgHCO₃
E)More than one of the above formulas is correct.

Question 35

The correct name for AuI₃ is

A)silver iodide
B)gold iodide
C)gold (III)iodide
D)gold iodide (III)

Question 36

What is the proper name for MgF₂?

A)magnesium fluoride
B)magnesium (I)fluoride
C)magnesium (II)fluoride
D)magnesium difluoride

Question 37

What is the proper name for CuCl?

A)copper chloride
B)copper (I)chloride
C)copper (II)chloride
D)copper monochloride

Question 38

The formula for zinc acetate is _____.

A)ZnCH₃CO₂
B)Zn(CH₃CO₂)₂
C)Zn(HCO₃)₂
D)Zn(HCl)₈

Question 39

Which chemical formula is not correct?

A)Na₂HCO₃
B)NaNO₃
C)Na₂HPO₄
D)Na₂SO₃
E)More than one of the above formulas is not correct.

Question 40

What is the name of the compound (NH₄)₂SO₄?

A)ammonium sulfide
B)ammonia sulfate
C)ammonia sulfoxide
D)ammonium sulfate
E)diammonium sulfate

Question 41

Ionic compounds are composed of positively and negatively charged ions held together by strong electrostatic forces.

Question 42

The name of an anion usually ends in the -ide if it is derived from a single atom or -ate (or -ite)if it is polyatomic.

Question 43

Ionic compounds have very high melting points compared to covalent compounds.

Question 44

A polyatomic ion is an ion that forms more than one charge.

Question 45

Ionic bonds result from the sharing of electrons between two atoms.

Question 46

Bonding is the joining of two atoms in a stable arrangement.

Question 47

The diphosphate ion is a biologically important polyatomic ion. If the ionic compound calcium diphosphate has the formula Ca₂P₂O₇, which correctly represents the ion symbol of the diphosphate ion?

A)P₂O₇^2-
B)PO^4-
C)2 PO₄^6-
D)P₂O₇^4-

Question 48

Neutral atoms always contain an equal number of protons, neutrons, and electrons.

Question 49

Elements in group 2A form ions with a +2 charge.

Question 50

The ionic formula for zinc oxide is ZnO₂.

Question 51

The symbol for the nitrite ion is NO₂^-.

Question 52

All ionic compounds are soluble in water.

Question 53

The correct name for CaHPO₄ is calcium phosphate.

Question 54

The (II)in the name of the ionic compound lead (II)acetate specifically indicates that there are two lead ions present in the compound.

Question 55

The noble gas that has the same electronic configuration as the iodide ion is krypton.

Question 56

Ionic compounds are composed of individual molecules, discrete groups of atoms that share electrons.

Question 57

An ionic compound is a pure substance formed by chemically combining two or more nonmetal atoms together.

Question 58

Anions are formed when a neutral atom gains one or more electrons.

Question 59

A cation is positively charged, and has more electrons than the neutral atom.

Question 60

Ionic compounds are usually solids at room temperature.

Question 61

In crystal of an ionic compound, the cations are surrounded by anions so that the charges of the ions are balanced.

Question 62

An iodide ion has 53 protons and 54 electrons.

Question 63

If the main group element has an electron-dot symbol of , the charge of the resulting ion will be -2.

Question 64

All isotopes of an element form the same type of ion.

Question 65

The formula for copper (II)hydroxide is Cu(OH)₂.

Question 66

The electron configuration for the sulfide ion is 1s²2s²2p⁶3s²3p⁶4s².

Question 67

The carbonate ion contains the same number of oxygen atoms as the sulfate ion.

Question 68

The ion symbol for the ferric ion is Fe²⁺.

Question 69

The sulfite ion contains more oxygen atoms than the sulfate ion.

Question 70

An iron (III)ion has 29 protons and 26 electrons.

Question 71

All p block elements form ions.

Question 72

All polyatomic ions are anions.

Question 73

The formula for stannic fluoride is SnF₄.

Question 74

Strontium and barium form ions with the same charge.

Question 75

Potassium sulfide has the chemical formula K₂S.

Question 76

Sodium nitrate and sodium nitrite are two acceptable names for the same compound.

Question 77

A main group element is especially stable when it possesses eight total electrons.

Question 78

The chemical formulas of ionic compounds are written with the cation first, and then the anion, with subscripts to show how many of each are needed to have zero net charge.

Question 79

Sodium bicarbonate and sodium hydrogen carbonate are two acceptable names for the same compound.

Question 80

If the main group element has an electron-dot symbol of , the charge of the resulting ion will be +2.