Chemistry test 3a

Which one of the following compounds is chromium (III) oxide? A)Crsub2Osub3 B)CrOsub3 C)Crsub3Osub2

A)Crsub2Osub3

The ions Ca2+ and POsub 4 3- top form a salt with the formula

Casub3(POsub4)sub2

____ typically form ions with a 2+ charge.

Chalcogens

The correct name for Cu(CN)sub2 is

Copper (II) cyanide

The correct name for SrO is

Strontium oxide

The correct name for Ksub2S is

potassium sulfide

The correct name of the compound Nasub3N

sodium nitride

Sodium forms an ion with a charge of____.

1+

Bromine forms an ion with a charge of___.

1-

Fluorine forms an ion with a charge of___.

1-

Iodine forms an ion with a charge of ___.

1-

How many electrons does the Al3+ ion possess?

10

Barium forms an ion with a charge of____.

2+

Calcium forms an ion with a charge of____.

2+

Oxygen forms an ion with a charge of___.

2-

Predict the charge of the most stable ion of S

2-

Sulfur forms an ion with a charge of___.

2-

Aluminum forms an ion with the charge of____.

3+

The charge on the manganese in the salt MnClsub3 is

3+

Predict the change of the most stable ion of P

3-

Aluminum reacts with a certain nonmetallic element to form a compound with the general formula Alsub2Xsub3. Element X must be from Group___ of the period table.

6A (16)

What would the most likely formula for the compound form with Lithium and element X? A) Lisub2X B)LiXsub2 C)Lisub2Xsub3

A

Which is not an ionic compound? A)PClsub5 B)CrClsub6 C)RbCl D)PbClsub2 E) NaCl

A

When calcium reacts with sulfur the compound formed is

CaS

Chromium and chlorine form an ionic compound whose formula is CrClsub3. The na,e of this compound is___.

Chromium (III) chloride.

What is the compound of copper(1) chloride

CuCl

Which metal is not required to have its charge specified in the names of ionic compounds it forms? A)Mn B) Fe C) Cu D)Ca

D

Which metal is capable of forming more than one cation? A) Li B) Ba C) Sr D) Al E) Sn

E

An ionic compound is...

Elements held together by shared electrons to be complete.

The correct formula of iron (III) bromide is...

FeBrsub3

What group in the periodic table would the fictitious element X with 7 dots be found?

Halogens

When a metal and a nonmetal react, the___ tends to lose electrons and the ____ tends to gain electrons.

metal, nonmetal

Anions tend to be__ and cations tend to be___.

negative?nonmetals,positive/metals

Aluminum reacts with a certain nonmetallic element to form a compound with the general formula AlX. Element X is a diatomic gas at room temp. Element X is

nitrogen

The charge on the iron ion in the salt Fesub2Osub3 is...

+3

The formula for ammonium carbonate is

(NHsub4)sub2COsub3

What is the correct formula for ammonium sulfide

(NHsub4)sub2S

The formula for a salt is XBr. THe X-ion in this salt has 46 electrons. The metal X is...

Ag

The formula for aluminum hydroxide is

Al(OH)sub3

Predict the formula of the ionic compound that forms from aluminum and oxygen.

Alsub2Osub3

What is a pair of elements that would likely form an ionic compound?

Barium, Chlorine

Predict the formula of the ionic compound that forms from Calcium and Fluorine.

CaFsub2

What is an example of an ionic compound involving Calcium.

CaO

The correct name for Mg(CIOsub3)sub2 is

Magnesium chlorate

Predict the formula of the ionic compound that forms from magnesium and fluorine.

MgFsub2

Predict the formula of the ionic compound that forms from magnesium and oxygen.

MgO

What is the species for a nitride ion?

N 3-

Barium reacts with a polyatomic ion to form a compound with the general formula Basub3(X)sub2. What would be the most likely formula for the compound formed between sodium and the polyatomic ion X?

Nasub3X

Element M reacts with Fluorine to form an ionic compound with the formula MFsub3. The M-ion has 18 electrons. Element M is

Sc

The correct name for Nasub2Osub2 is

Sodium peroxide

What is an example of an ionic compound involving Sr?

SrClsub2

What is the formula of the compound formed between strontium ions and nitrogen ions?

Srsub3Nsub2

The correct name for Alsub2osub3 is

aluminum oxide

The name of the ionic compound (NHsub4)sub3POsub4 is

ammonium phosphate

The correct name for CaHsub2 is

calcium hydride

Metals tend to__ electrons and nonmetals tend to __ electrons.

lose, gain

The correct name for MgFsub2 is...

magnesium fluoride