practice exam chem test 2
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.
