Chem Homework 3

When nitrogen, oxygen, fluorine, sodium, magnesium and aluminum ionize, they will have: A) an unchanged electron configuration. B) different electron configuration from each other. C) the same electron configuration (isoelectronic) as neon. [Definition: The word isoelectronic means that when you write out the electron configuration they are the same. An exam would be He and Li+ whereby both of them have 2 electrons and therefore they are both are 1s2 in their electron configurations.] D) the same charge.

C) the same electron configuration (isoelectronic) as neon. [Definition: The word isoelectronic means that when you write out the electron configuration they are the same. An exam would be He and Li+ whereby both of them have 2 electrons and therefore they are both are 1s2 in their electron configurations.]

If an atom (X) with 3 valence electrons combines with an atom (Y) with six valence electrons, to form an ionic compound, what is the formula of the ionic compound that is formed? A. XY2 B. XY C. X2Y3 D.X2Y

C. X3Y2

calcium nitride

Ca3N2

A positively charged ion is known as a(n) ________ and a negatively charge ion is known as a(n) ________.

Cation Anion

copper(II) nitrate

Co(NO3)3

chromium(II) perchlorate

Cr(ClO4)2

copper(II) oxide

CuO

What is the ion symbol for an atom with 20 protons and 18 electrons? A) Ca B) Ar2+ C) Ar2- D)Ar E) Ca2+

E) CA2+

Give the names of the ions formed form these neutral atoms Nitrogen oxygen fluorine phosphorus sulfur Chlorine

Nitride Oxide Fluoride Phosphide Sulfide Chloride

Ionic Compounds consist of _______ and negate charges have _________ melting points are ___________ at room temperature

Positive High Solid

Name each of the following ionic compounds: NaBr AlBr3 Na2S Al2S3 Na3N AlN

Sodium bromide Aluminum bromide Sodium sulfide Aluminum sulfide Sodium nitride Aluminum nitride

name the following polyatomic ions: SO42- CO32- PO43- OH- NH4+ SO32- NO2-

Sulfate carbonate phosphate Hydroxide Ammonium Sulfite Nitrite

Zinc Hydroxide

Zn(OH)2

Al(CN) 3

aluminum cyanide

(NH4)2S

ammonium sulfide

When a calcium atom forms an ion, it is known as the _______ ion when an aluminum atom forms an ion, it is known as the ______ ion When an oxygen atom forms an ion, it is known as the ______ ion when a chlorine atom forms an ion, it is known as the _______ ion When a sulfur atom forms an ion it is know as the _________ ion When a Nitrogen atom forms an ion it is known as the ________ ion

calcium aluminum oxide chloride sulfate nitride

CaCl2

calcium chloride

MgS

magnesium sulfide

Ion formation: ______ tend to lose electrons to form _____ charged Ions, and _______ tend to gain electrons to form ______ charged ions.

metals negatively Non-metals Positively

Ag 2SO 4

silver sulfate

What are the changes in size seen when a neutral atoms becomes a cation and when a neutral atoms becomes an anion? When a neutral atom becomes a cation in get___________ When a neutral atom becomes an anion, it gets ___________. A) larger B) smaller

smaller larger

Na2O

sodium oxide

ammonium carbonate

(NH4)2CO3

The ionic compound calcium fluoride, CaF2, has calcium cation and fluoride anions. The ionic compound Al2O3 has aluminums and oxides. The ionic compound AlN has aluminum and nitride.

1:2 2:3 1:1

How many electrons are in a Li+?

2

To balance ionic charge in an ionic compound, total positive charge = total negative charge. Therefore, when sodium and oxygen form a compound, there will be _________ sodiums and ________________ oxygens. When calcium and oxygen form a compound, there will be _________ calciums and _______________oxygens. When sodium and nitrogen form a compound, there will be __________sodiums and ____________nitrogens.

2:1 1:1 3:1

The element iron, Fe, can be commonly found with any of the following charges: 3+ 0 1- 3- 2+ 1+ 2-

3+ 2+

What is the electron configuration of an F- ion? A) 1s22s22p6 B) 1s22s22p4 C) 1s22s22p5. X D) 1s22s22p63s1

A) 1s22s22p6

A Roman numeral equal to the ion charge is placed in parentheses immediately after the metal name for.... A) Transition metals except for Zn2+, Cd2+, and Ag+ B) All representative elements C) Main group anions D) polyatomic ions

A) Transition metal expect for Zn2+ Cd2+ and Ag+

What roman numeral is required in the name of the following compound? FeS A. I B. II C. III D. IV E. No roman numeral is required.

B) II

If an atom (X) with two valence electrons combines with an atom (Y) with six valence electrons, to form an ionic compound, what is the formula of the ionic compound that is formed? A) X3Y2 B) XY C) X2Y2 D) X2Y E) XY2

B) XY

If an atom (X) with 1 valence electron combines with an atom (Y) with 7 valence electrons, to form an ionic compound, what is the formula of the ionic compound that is formed? A. XY2 B. X2Y2 C. XY D. X2Y

B. X2Y2

barium phosphate

Ba3(PO4)2

Classify these compounds as ionic or covalent: KCl Ca(NO3)2 CBr4 AlBr3 Br2 NO2 NH3 NaNO2

KCl: ionic Ca(NO3)2: Ionic CBr4: covalent AlBr3: Ionic Br2: covalent NO2: covalent NH3: Covalent NaNO2: ionic

Match each of the following atoms with the charge it will posess when it ionizes. Lithium Oxygen Phosphorus Iodine Aluminum Calcium A.2- B.3+ C.3- D.1+ E.2+ F.-1

Lithium: 1+ Oxygen: 2- Phosphorus: 3- Iodine: 1- Aluminum: 3+ Calcium: 2+

iron(II) sulfite

FeSO3

Match the chemical formulae with the name of the ionic compound: FeCl2 Fe2O3 AgCl Ca3N2 Ca(NO3)2 Na2SO3 Na2SO4 LiOH MgO Cu(NO3)2 A. Calcium nitrate B. Sodium sulfate C. Silver chloride D. Copper(II) nitrate E. Calcium nitride F. Sodium sulfite G. Iron(II) chloride H. Lithium hydroxide I. Magnesium oxide J. Iron(III) oxid

G J C E A F B H I D