practice exam chem test 2

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

What is the formula of the compound formed by ammonium and sulfate?

(NH4)2SO4

How many protons and neutrons are in Cl-37?

17 protons, 20 neutrons

The number of electrons in 31/15 P3- is

18

A specific isotope of an element is known to have 15 protons and 16 neutrons. Which symbol would properly represent this isotope?

31/15 P

How many protons and electrons are present in O2-?

8 protons and 10 electrons.

Which of the following ions is INCORRECTLY named?

As3- Arsenic

Oxygen containing ionic compound has the formula M2O where M is an unknown ion. Ion M has 78 electrons. What is the identity of the M ion?

Au+

What is the formula for an ionic compound made from barium and nitrogen?

Ba3N2

The following substances are named correctly EXCEPT

CH4 - Carbon tetrahydride

What is the correct formula for the hypochlorite polyatomic ion?

ClO-

What is the name of Co3N2?

Cobalt(II) nitride

T or F Gold and silver are inner transition elements.

F

T or F Graphite, diamond and buckminsterfullerene are allotropes of gold.

F

T or F If He-4 is the standard with an assigned mass of exactly 2 amu, C-12 will have an assigned mass 24 amu.

F

T or F Metals form cations by gaining electrons.

F

T or F NH4Br is a covalent molecular compound.

F

T or F Protons and electrons each have a mass of 1 amu.

F

T or F Silicon is a nonmetal.

F

T or F The acid derived from nitrite is nitric acid and its formula is HNO3(aq).

F

T or F The alkali metal in the 4th period is calcium.

F

T or F The chemical formula of the oxyacid formed by sulfite is H2SO4(aq).

F

T or F The correct formula for calcium fluoride is CaF3-.

F

T or F The correct formula for lithium permanganate is LiMgO4.

F

T or F The correct name for the compound whose chemical formula is Cu2CrO4 is copper chromate.

F

T or F The correct name for the compound with the formula XeO2 is monoxenon dioxide.

F

T or F The formula for ammonia is NH4+.

F

T or F The formula for dinitrogen pentoxide is N2O7.

F

T or F The formula for the compound formed by calcium and chlorate is CaClO3-.

F

T or F The formula of the compound formed by iron(II) and carbonate is Fe2(CO3)2.

F

T or F The name of the compound CH4 is ammonia.

F

T or F The name of the compound formed by Mn2+ and NO2- is manganese nitrite.

F

T or F The name of the ion C2H3O2- is peroxide.

F

T or F The name of the ion N3 is nitrogen.

F

Which of the following is NOT an alkali metal?

H

A certain oxyacid is derived from SO32 . The formula for the oxyacid is

H2SO3(aq)

Which of the following gives an INCORRECT name for the acid?

H2SO3(aq) - Sulfuric acid

Which of the following formula is INCORRECTLY named?

Hg2Br2 - Mercury(II) bromide

What is the proper name for HBr(aq) ?

Hydrobromic acid

What is the proper name for HF(aq)?

Hydrofluorous acid

Which of the following is a halogen?

I

According to Dalton's atomic theory,

Indestructible atoms make up matter.

An element has a mass number of 119. It has 69 neutrons and 46 electrons. Which of the following is TRUE about this element?

It's nuclear charge is +50.

Which of the following gives an INCORRECT name for the compound?

Li2S - Lithium(I) sulfide

Which of the following element is INCORRECTLY matched with the atomic number?

Manganese - 12

Which of the following have chemical properties similar to Ba?

Mg

Identify the ions composing Mn(SO3)2.

Mn4+ and SO32-

What is the name of the compound with the formula Ni3(PO4)2?

Nickel(II) phosphate

A compound contains an unknown anion Q and has the formula Mg3Q2. Ion Q has 18 electrons. What is the identity of ion Q?

P3-

What is the correct formula for phosphide?

P3-

What are the ions composing Pb(CO3)2?

Pb4+ and CO32-

Which of the following is a metalloid?

Sb

What is the cation in Sn(SO3)2?

Sn4+

Which of the following gives an INCORRECT group for the given element?

Sr - Alkali metal

What is the name of the molecular compound SF5?

Sulfur pentafluoride

T or F According to Mendeleev's periodic law, when elements are arranged in increasing atomic mass, certain properties recur periodically.

T

T or F Although ionic compounds always contain positive and negative ions their net charge is zero.

T

T or F Anions are negatively charged ions.

T

T or F Based on the current standard for atomic mass, the mass of 1 amu is 1/12 the mass of the C-12 atom.

T

T or F If two atoms each contain different numbers of protons, the atoms must be from different elements.

T

T or F Ionic compounds have a net charge of zero.

T

T or F Isotopes of the same element have different masses because they have different number of neutrons.

T

T or F The average atomic mass of selenium is 78.96 amu.

T

T or F The correct name for RbBrO4 is rubidium perbromate.

T

T or F The formula for the acid derived from Cr2O72- is H2Cr2O7(aq).

T

T or F The formula for the oxyacid formed by carbonate is H2CO3(aq).

T

T or F The ionic compound that forms between Zn and O is ZnO.

T

T or F The name of the acid formed from CN is hydrocyanic acid.

T

T or F The name of the ion with the symbol Hg22+ is mercury(I).

T

T or F The nucleus of an atom consists mainly of protons and neutrons.

T

T or F The nucleus of an atom is tiny and massive.

T

T or F The subscripts in a chemical formula do not change for a given compound.

T

T or F The symbol for the hypoiodite ion is IO .

T

A certain isotope has an atomic number of 24 and a mass number of 54. This isotope

has 30 neutrons.


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