Chemistry Chapter 7

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Which of the following is NOT true of ionic compounds?
A. The ions in an ionic compound are not physically attached to each other.
B. Ionic compounds must have an positive ion and a negative ion.
C.Ionic Compounds involve electrons that are being lost or gained.
D. All statements are true.

D.All statements are true.

Noble gases have low reactivity because of?

Their outermost energy levels are filled.

The sum of the oxidation numbers in a NEUTRAL compound is ____.

Zero

Which of the following is NOT one of the exceptions to the octet rule?
A.Lithium
B.Boron
C.Hydrogen
D.All are exceptions

D.All are exceptions

How many sodium atoms need to combine with one carbonate ion to make a neutral compound?

Na charge = +1 CO3 charge = -2

2

How many electrons are needed in the outer energy levels of MOST atoms for the atom to be chemically stable?

8

What is the oxidation number for hydrogen in ALL compounds?

+1

Lithium's oxidation number is +1. The oxidation number of phosphorus in lithium phosphate (Li3PO4) is?

Li = +1 O = -2 P = ?

+5

The oxidation number of carbon in carbon dioxide (CO2) is?

C = ? O = -2

+4

CO2 is classified as a(n)?

Compound

PO4 with a charge of -3 is classified as a(n)?

Poly-atomic ion

MgO is classified as a(n)?

Compound

Cu is classified as a(n)?

Element

Li with a charge of +1 is classified as a(n)?

Mono-atomic ion

The octet rule states what two things?

Atoms want to have 8 valence electrons.
Atoms are either 8 or bust (they either will gain electrons to get 8 valence electrons, or they will give up their electrons, depending on the number of valence electrons they have.)

Losing and gaining electrons and charges are a part of what type of bonding?

Ionic

What are the exceptions to the Octet rule?

Hydrogen, Helium, Lithium, Beryllium, and Boron

What are the physical properties of an ionic compound?

Melting point is high
Boiling point is high
Hardness is high (they are brittle)
Good Conductors
Low flammability

The oxidation number of all atoms in a substance add up to equal what?

The charge of the atom

A substance can be a what?

Element, mono-atomic or poly-atomic ion, or a compound.

The charge of a compound equals?

0

Oxidation number of:
Hydrogen = (A)?
Fluorine = (B)?
Oxygen = (C)?

A = +1
B = -1
C = -2

The force that holds two atoms together is called a(n) (1)__________. Such an attachment may form by the attraction of the positively charged (2)_________ of one atom for the negatively charged (3)________ of another atom, or by the attraction of charged atoms, which are called (4)_______. The attractions may also involve (5)_______ electrons, which are the electrons in the outermost (6)_________. The (7)_________ are a family of elements that have very little tendency to react. Most of these elements have a set of eight outermost electrons, which is called a stable (8)________. The relatively stable electron structures developed by loss of electrons in certain elements of groups 3, 4, 13, and 14 are called (9)______.



Word Bank: Chemical Bond; Electrons; Energy level: ions; Nobel Gases; Nucleus; Octet; Pseudo-Noble Gas Formations; Valence

1.Chemical Bond
2.Nucleus
3.Electrons
4.Ions
5.Valence
6.Energy levels
7.Nobel gases
8.Octet
9.Pseudo-Noble Gas Formations

T or F: A positively charged ion is called an anion.

F (anions are negatively charged, while cations are positively charged)

T or F: Elements in group 1 lose their one valence electron, forming an ion with a charge of 1+.

True

T or F:Elements tend to react so that they acquire the electron structure of a halogen.

F (they react to form the electron structure of a Noble Gas)

T or F:A sodium atom tends to lose on electron when it reacts.

T

T or F: The electron structure of a zinc ion (Zn with charge of 2+) is an example of a pseudo-noble gas formation.

T

T or F: A Cl ion with a charge of 1- is an example of a cation.

F (it is an anion)

T or F: The ending -ide is used to designate an anion.

T

T or F: Nonmetals form a stable outer electron configuration by losing electrons an d becoming anions.

F

An ionic bond is a?

Force that holds together atoms that are oppositely charged.

The formula unit of an ionic compound shows the ?

Simplest ration of the ions

The overall charge of a formula unit for an ionic compound is?

always 0.

How many chloride (Cl with a charge of 1-) ions are present in a formula unit of magnesium chloride, given that the charge on a Mg ion is 2+?

2

Ionic bonds generally occur between a?

Metal and Nonmetal

A three-dimensional arrangement of particles in an ionic solid is called a(n)?

Crystal lattice.

In a crystal lattice of an ionic compound,?

ions are surrounded by ions of the opposite charge.

What is the relationship between lattice energy and the strength of the attractive force holding ions in place?

The more negative the lattice energy is, the greater the force.

The formation of a stable ionic compound forms ions?

May be either exothermic or endothermic.

In electron transfer involving a metallic atom and a nonmetallic atom during ion formation, which of the following is correct?
A.The metallic atom gains electrons from the nonmetallic atom.
B.The nonmetallic atom gains electrons from the metallic atom.
C.Both atoms gain electrons.
D.Neither atom gains electrons.

D.The nonmetallic atom gains electrons from the metallic atom.

T or F:The crystal lattice of ionic compounds affects their melting and boiling points.

T

T or F:The lattice energy is the energy required to separate the ions of an ionic compound.

T

T or F:The energy of an ionic compound is higher than that of the separate elements that formed it.

F

T or F:Large ions tend to produce a more negative value for lattice energy than smaller ions do.

F

T or F:Ions that have larger charges tend to produce a more negative lattice energy than ions with smaller charges doe.

T

A one-atom ion is called a(n) (1)_________ ion. The charge of such an ion is equal to the atom's (2)_________, which is the number of (3)________ transferred to or from the atom to form the ion. In ionic compounds, the sum of the charges of all the ions equals (4)________. Ions made up of more than one atom are called (5)_________ ions. If such an ion is negatively charged an includes one or more oxygen atoms, it is called a(n) (6)_______. If two such ions can be formed that contain different numbers of oxygen atoms, the name for the ion with more oxygen atoms ends with the suffix (7)________. The name for the ion with fewer oxygen atoms ends with (8)______.
In the chemical formula for any ionic compound, the chemical symbol for the (9)_______ is written first, followed by the chemical symbol for the (10)________. A(n) (11)________ is a small number used to represent the number of ions of a given element in a chemical formula. Such numbers are written to the (12) _________ of the symbol for the element. If no number appears, the assumption is that the number equals (13)_____.

Word Bank: Anion; -ate; cation; electrons; zero; lower right; monatomic; one; oxidation number; -ite; oxyanion; poly-atomic; subscript

1.monatomic
2.oxidation number
3.electrons
4.zero
5.poly-atomic
6.oxyanion
7.-ate
8.-ite
9.cation
10.anion
11.subscript
12.lower right
13.one

Electrons that are free to move in metals are called?

Delocalized Electrons

For a monatomic ion, is equal to the charge

Oxidation number

The force that holds two atoms together

Chemical bond

A charged particle containing more than one atom is a ?

Poly-atomic ion

A positively charged ion

cation

A negatively charged ion

anion

An ionic compound whose aqueous solution conducts electricity.

Electrolyte

The name for most ionic compounds, other than oxides.

Salts

Represents the way electrons exist in metals.

Electron Sea Model

A charged particle containing only one atom

Monatomic ion

The energy needed to separate the ions of an ionic compound.

Lattice Energy

The electrostatic force that holds oppositely charged particles together.

Ionic bond

A mixture of elements that has metallic properties.

Alloy

A mixture formed when small atoms fill holes in a metallic crystal.

Interstitial alloy

A poly-atomic ion composed of an element bonded to at least one oxygen.

Oxyanion

Shows the simplest ration of ions in an ionic compound.

Formula Unit

The attraction of a metallic cation for delocalized electrons.

Metallic Bond

T or F: The overall charge of a formula unit for a compound is NEVER zero.

F: always

T or F: In a crystal lattice, each positive ion is surrounded by NEGATIVE ions.

T

T or F:Delocalized valence electrons are typical of IONIC COMPOUNDS.

F: Metals

T or F:A sulfate ion contains FEWER oxygen atoms than a sulfite ion does.

F: More

T or F: METALS tend to be malleable and ductile and to have relatively high melting points.

T

T or F: In naming ionic compounds, the CATION is named first.

T

T or F:When a metal reacts with a nonmetal the metal tends to GAIN electrons.

F: Lose

T or F:In naming a moatomic anion, the suffix -IDE is used.

T

T or F:The prefix PER- is used in naming the anion with the most oxygen atoms.

T

How many outermost d electrons are there in an ion that has achieved a pseudo-noble gas configuration?

10

Where does the subscript that indicates the number of atoms appear, relative to a chemical symbol in a formula?

To the lower right.

Which of these is an example of an interstitial alloy?
A.Brass
B.14-carat gold
C.Carbon Steel
D.Sterling Silver

C.Carbon Steel

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