Chemistry101 Test 2
What is the correct IUPAC name for SO₃?
sulfur trioxide
What is the correct IUPAC name for AlPO₄?
aluminum phosphate
Write the chemical formula for silicon dioxide
SiO₂
Write the chemical formula for vanadium(I) nitrite
VNO₂
What is the correct IUPAC name for CsI?
cesium iodide
What is the correct IUPAC name for CBr₄?
Carbon Tetrabromide
Write the chemical formula for calcium nitride
Ca₃N₂
Write the chemical formula for ammonium phosphide
(NH₄)₃P
What is the mass number of tin-117?
117 Isotopes can be written as "element-mass number"
What is the mass number of zinc-68?
68 Isotopes can be written as "element-mass number"
Which element resides in the third period under group 4A (14) of the periodic table? A) Ge B) Si C) Al D) Sc E) P
B) Si The element in the 3rd row (3rd period) and the 14th column (Group 4A) of the periodic table is Si.
Which of the following is a transition metal? A) Strontium B) Silver C) Sulfur D) Samarium E) Sodium
B) Silver Transition metals are found in the d-block of the periodic table.
Write the chemical formula for lithium bromate
LiBrO₃
List the following atoms in order of increasing size (atomic radius): Pb, Rn, Ba. A) Rn < Pb < Ba B) Rn < Ba < Pb C) Ba < Pb < Rn D) Pb < Rn < Ba
A) Rn < Pb < Ba Rn < Pb < Ba. In general, atomic radius decreases across a period and increases down a group.
An atom of the isotope ¹³³Cs contains how many protons (p), neutrons (n), and electrons (e)? A) 55 p, 55 n, 55 e B) 55 p, 78 n, 55 e C) 133 p, 133 n, 133 e D) 55 p, 133 n, 55 e E) 133 p, 55 n, 55 e
B) 55 p, 78 n, 55 e
Which of the following is an alkaline earth metal? A) Rubidium B) Beryllium C) Iridium D) Americium E) Phosphorous
B) Beryllium The alkaline earth metals are found in Group 2 and include Be, Mg, Ca, Sr, Ba, and Ra.
Which of the following atom(s) below has/have five valence electrons? A) C B) N C) O D) F E) All of the above
B) N Elements in Group 15 have 5 valence electrons. These include: N, P, As, Sb, Bi, and Mc.
Which has a greater mass? A) Electron B) Proton C) They have equal masses D) Not enough information
B) Proton A proton has a mass of 1.673×10−271.673×10−27 kg, an electron has a mass of 9.109×10−319.109×10−31 kg, and a neutron has a mass of 1.675×10−271.675×10−27 kg.
Elements that are most similar in their properties are found _____. A) in the same period. B) in the same group. C) have the same electron configurations. D) to occur randomly throughout the table. E) diametrically opposite each other on the periodic table.
B) in the same group. Elements that are in the same group have similar properties.
What is the atomic number for an element whose mass number is 70, which contains 38 neutrons per atom?
32 The mass number of an atom is representative of the number of protons and neutrons. The number of protons can be found from the atomic number of the element on the periodic table. Calculate the number of protons/atomic number using the given mass number and neutrons.
Write the chemical formula for copper(II) bromide
CuBr₂
Which of the following is a main group element? A) Yttrium B) Osmium C) Holmium D) Californium E) Bismuth
E) Bismuth The main group elements are elements that belong to the s and p blocks of the periodic table.
Which of the following is a halogen? A) Sodium B) Copper C) Neodymium D) Selenium E) Iodine
E) Iodine The halogens are found in Group 17 and include F, Cl, Br, I, At, and Ts.
Write the chemical formula for sulfur tetraiodide
SI₄
Write the chemical formula for strontium perchlorate
Sr(ClO₄)₂
What is the correct IUPAC name for CaCO₃?
calcium carbonate
What is the correct IUPAC name for CsHSO₄?
cesium hydrogen sulfate
What is the correct IUPAC name for Cr₂(S₂O₃)₃?
chromium(III) thiosulfate
What is the correct IUPAC name for Co(ClO)₂?
cobalt(II) hypochlorite
What is the correct IUPAC name for CuClO₃?
copper(I) chlorate
What is the correct IUPAC name for S₂F₈?
disulfur octafluoride
What is the correct IUPAC name for IF₅?
iodine pentafluoride
What is the correct IUPAC name for Ir(NO₂)₄?
iridium(IV) nitrite
What is the correct IUPAC name for LiOH?
lithium hydroxide
What is the correct IUPAC name for LiSCN?
lithium thiocyanate
What is the correct IUPAC name for Mn(CN)₂?
manganese(II) cyanide
What is the correct IUPAC name for MnF₃?
manganese(III) fluoride
What is the correct IUPAC name for NiS?
nickel(II) sulfide
What is the correct IUPAC name for RbNO₂?
rubidium nitrite
What is the correct IUPAC name for RuCl₃?
ruthenium(III) chloride
What is the correct IUPAC name for SeF₂?
selenium difluoride
What is the correct IUPAC name for SeO₂?
selenium dioxide
What is the correct IUPAC name for P₄S₃?
tetraphosphorus trisulfide
Write the chemical formula for carbon disulfide
CS₂
Which has the correct name-formula combination? A) Iron(II) nitride - FeN B) Nickel(II) oxide - NiO₂ C) Titanium(IV) phosphide - TiP D) Manganese(II) sulfide - MnS
D) Manganese(II) sulfide - MnS Consider the charge of the ions to make sure the charges are balanced. For the transition metals, the charge is indicated in the name with a Roman numeral in parentheses.
Rank the following atoms in order of increasing size (i.e., smallest to largest): Li, Al, Be, Ba, O. A) Li < Al < Be < Ba < O B) Ba < Al < Li < Be < O C) Li < Be < O < Al < Ba D) O < Be < Li < Al < Ba E) O < Li < Be < Ba < Al
D) O<Be<Li<Al<Ba In general, atomic radius decreases across a period and increases down a group.
What does the mass number of an atom represent? A) number of neutrons in the atom B) number of protons in the atom C) atomic mass of the element D) total number of electrons and neutrons in the atom E) total number of protons and neutrons in the atom
E) total number of protons and neutrons in the atom The mass number of an atom represents the total number of protons and neutrons in the atom.
Write the chemical formula for iron(III) oxalate
Fe₂(C₂O₄)₃
Write the chemical formula for potassium chloride
KCl
Write the chemical formula for phosphorus trihydride
PH₃
Which of the following atoms has the same number of neutrons as ⁵⁹Ni? A) ⁵⁷Co B) ⁵⁸Fe C) ⁵⁸Ni D) ⁵⁹Co E) ⁶⁰Cu
E) ⁶⁰Cu
Which two particles of the atom have nearly identical masses? A) Proton and electron B) Proton and neutron C) Neutron and electron D) No two particles have similar masses
B) Proton and neutron A proton has a mass of 1.673×10−271.673×10−27 kg, an electron has a mass of 9.109×10−319.109×10−31 kg, and a neutron has a mass of 1.675×10−271.675×10−27 kg.
Atomic radii decrease from left to right in a period (Na → Ar) on the periodic table. Choose the best explanation for this observed trend. A) The ionization potential decreases in that direction. B) The electron affinity increases in that direction. C) The atomic mass increases in that direction. D) The nuclear charge increases in that direction. E) The number of electrons increases in that direction.
D) The nuclear charge increases in that direction. As the nuclear charge increases, all electrons in the outer shell (in this case the third shell) are attracted more strongly to the nucleus and are pulled closer to the nucleus.
Rank the following atoms in order of decreasing size (i.e., largest to smallest): Rb, F, Mg, B, N. A) Rb > Mg > B > N > F B) N > F > B > Mg > Rb C) Rb > Mg > F > N > B D) Mg > Rb > B > N > F E) Rb > Mg > N > B > F
A)Rb>Mg>B>N>F In general, atomic radius decreases across a period and increases down a group.
Which of the following is a lanthanide element? A) Lithium B) Molybdenum C) Europium D) Plutonium E) Astatine
C) Europium The lanthanides are: La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu.
Which of the following statements about subatomic particles are false? I. Some atoms do not have any neutrons. II. Protons and neutrons reside in the nucleus. III. Some atoms do not have any protons. A) I only B) II only C) III only D) II and III E) I and II
C) III only Statement III, "some atoms do not have any protons," is false. All atoms have protons. The number of protons in the nucleus is the atomic number.
List the following atoms in order of increasing size (atomic radius): Ba, Mg, Sr. A) Sr < Ba < Mg B) Ba < Sr < Mg C) Mg < Sr < Ba D) Mg < Ba < Sr
C) Mg < Sr < Ba Mg < Sr < Ba. In general, atomic radius decreases across a period and increases down a group.
Which subatomic particle is found in the nucleus and has a positive charge? A) Electron B) Neutron C) Proton D) Positron
C) Proton Protons are subatomic particles found in the nucleus that have a positive charge.
Ignoring the sign, which has a greater magnitude of charge? A) Electron B) Proton C) They have equal charges D) Not enough information
C) They have equal charges Electrons and protons have opposite charges that are equal in magnitude
The net charge on an atom of a given element changes as ______ are added or removed. A) neutrons B) protons C) electrons D) protons and electrons
C) electrons The removal or addition of electrons, typically to an element's outermost or valence orbital, results in a net charge on an atom.
Which of the following metals would be expected to have the smallest atomic radius? A) Cesium (Cs) B) Barium (Ba) C) Lanthanum (La) D) Europium (Eu) E) Tantalum (Ta)
E) Tantalum (Ta) The atomic radius increases as you move down the periodic table and to the left. Tantalum is the furthest to the right of this list and nearer the top and it would be expected to have the smallest atomic radius.
Write the chemical formula for dinitrogen trioxide
N₂O₃
Write the chemical formula for tetraphosphorus hexasulfide
P₄S₆
Write the chemical formula for tellurium diiodide
TeI₂
Write the chemical formula for thallium(I) bromite
TlBrO₂
What is the correct IUPAC name for Sn(NO₃)₄?
tin(IV) nitrate
What is the correct IUPAC name for W(BrO₂)₄?
tungsten(IV) bromite
What is the correct IUPAC name for W(Cr₂O₇)₂?
tungsten(IV) dichromate
Write the chemical formula for lithium fluoride
LiF
Write the chemical formula for lithium hydroxide
LiOH
What is the correct IUPAC name for Pb(NO₂)₂?
lead(II) nitrite
What is the correct IUPAC name for PBr₃?
phosphorus tribromide
What is the correct IUPAC name for K₂O
potassium oxide
What is the mass number for an atom of osmium containing 76 protons and 110 neutrons?
186 The mass number of an atom is representative of the number of protons and neutrons. The number of protons can be found from the atomic number of the element on the periodic table. Calculate the mass number using the given number of protons and neutrons.
How many protons are in an atom of Fe?
26 The atomic number represents the number of protons in an atom.
What is the atomic number for an element whose mass number is 145, which contains 85 neutrons per atom?
60 The mass number of an atom is representative of the number of protons and neutrons. The number of protons can be found from the atomic number of the element on the periodic table. Calculate the number of protons/atomic number using the given mass number and neutrons.
What is the atomic number for an element whose mass number is 152, which contains 88 neutrons per atom?
64 The mass number of an atom is representative of the number of protons and neutrons. The number of protons can be found from the atomic number of the element on the periodic table. Calculate the number of protons/atomic number using the given mass number and neutrons.
Which of the following does NOT describe the element bromine (Br)? A) A metalloid B) A nonmetal C) A main group element D) A halogen
A) A metalloid Bromine (Br) is in group 7A (17) making it a halogen. This also means it is a main group element as well as a nonmetal.
What element is theoretically the largest of all on the periodic table? A) Francium (Fr) B) Helium (He) C) Hydrogen (H) D) Lead (Pb) E) Radon (Rn)
A) Francium (Fr) Atomic radius increases as you move down the periodic table and to the left. Francium is the furthest down and to the left of this group and would be predicted to to be the largest element of the whole periodic table.
Which of the following is an example of an ionic bond? A) K - F B) C - H C) Kr - H D) C - F
A) K - F K-F is an ionic bond because the difference in electronegativity is greater than 1.5 and it is between a metal and a nonmetal.
Which of the following is NOT a metalloid? A) Lead B) Silicon C) Arsenic D) Tellurium E) Astatine
A) Lead The metalloids are: B, Si, Ge, As, Sb, Te and Po.
Which of the following groups of elements tend to form cations? A) Metals B) Metalloids C) Nonmetals D) Noble gases E) Radioactive elements
A) Metals Metals tend to form cations.
Write the chemical formula for diarsenic trioxide
As₂O₃
How many neutrons are in an atom of uranium-235? A) 92 B) 143 C) 235 D) 238.0
B) 143 Uranium-235 has a mass of 235. Uranium always has 92 protons. Therefore, uranium-235 has 143 neutrons.
How many electrons are in a neutral ⁴¹Ca atom? A) 2 B) 20 C) 21 D) 41
B) 20 Calcium has 20 protons. Therefore a neutral calcium atom has 20 electrons.
How many protons are in an atom of strontium-90? A) 2 B) 38 C) 87.62 D) 90
B) 38 Strontium has an atomic number of 38. The atomic number is the number of protons in an atom.
In which direction on the periodic table does metallic character increase? A) Down and to the right. B) Down and to the left. C) As you move toward the middle of the table. D) Up and to the right. E) Up and to the left.
B) Down and to the left. Metallic character increases down and to the left of the periodic table.
Which subatomic particle is found in the nucleus and has no charge? A) Electron B) Neutron C) Proton D) Positron
B) Neutron Neutrons are subatomic particles found in the nucleus that have no charge.
The nucleus of an atom contains: A) Protons and electrons B) Protons and neutrons C) Electrons and neutrons D) Protons, neutrons and electrons E) Electrons only
B) Protons and neutrons The nucleus of an atom contains protons and neutrons
What element with a mass number of 100 has 56 neutrons in its nucleus? A) Fermium (Fm) B) Ruthenium (Ru) C) Barium (Ba) D) Copernicium (Cn) E) Radium (Ra)
B) Ruthenium (Ru) The mass number of an atom is representative of the number of protons and neutrons. Calculate the number of protons from the mass number and neutrons. Then, find the element in the periodic table that contains 44 protons. The number of protons is indicated by the atomic number. The element is Ruthenium (Ru).
Halogens tend to form anions because A) losing electrons will fill their octet faster than gaining them. B) gaining electrons will fill their octet faster than losing them. C) halogen element ionization energies are lower than transition metal ionization energies. D) halogen atomic radii tend to be larger than their corresponding ionic radii. E) halogen atomic radii tend to be smaller than their corresponding ionic radii.
B) gaining electrons will fill their octet faster than losing them. Halogens tend to form anions because gaining electrons will fill their octet faster than losing them.
What is the atomic symbol and mass number for an atom containing 50 protons and 64 neutrons? A) ⁵⁰Sn B) ¹¹⁴Sn C) ⁶⁴Sn D) ⁶⁴Gd E) ¹¹⁴Gd
B) ¹¹⁴Sn
Which of the following would be an isotope of ¹⁴N? A) ¹⁴C B) ¹⁶N C) ¹⁴O D) ¹⁶O E) All of the above
B) ¹⁶N Isotopes are forms of the same element that differ in the number of neutrons but contain the same number of protons and electrons. ¹⁶N is an isotope of ¹⁴N.
Which of the following pairs represent isotopes? A) ²⁸Si and ²⁸Si⁴⁺ B) ²⁸Si and ²⁸Al C) ²⁸Si and ²⁹Si D) ²⁸Si and ²⁸Si⁴⁻ E) ²⁸Si⁴⁺ and ²⁸Al³⁺
C) ²⁸Si and ²⁹Si Isotopes are forms of the same element that differ in the number of neutrons but contain the same number of protons. The standard notation for an isotope is to indicate the mass number because its protons and electrons do not change.
Write the chemical formula for copper(II) oxide
CuO
List the following atoms in order of increasing size (atomic radius): Se, O, Cl. A) Cl < O < Se B) Se < Cl < O C) O < Se < Cl D) O < Cl < Se
D) O < Cl < Se O < Cl < Se. In general, atomic radius decreases across a period and increases down a group.
Which has the correct name-formula combination? A) Barium sulfate - Ba(SO₄)₂ B) Calcium phosphate - Ca₂(PO₄)₃ C) Lithium sulfate - LiSO₄ D) Potassium phosphate - K₃PO₄
D) Potassium phosphate - K₃PO₄ Consider the charge of the ions to make sure the charges are balanced. Three potassium ions are needed to balance the charge of one phosphate ion. This yields the formula K₃PO₄
The trend towards smaller atomic radii as one moves to the right in a period is _____. A) faulty, as atomic radii in a period are nearly uniform in size. B) because of electron pair repulsion causing the expansion of the orbitals. C) wrong. Atomic radii increase across a period left to right as the larger d and p orbitals are occupied after the s orbital. D) due to the effective nuclear charge decreasing. E) due to the effective nuclear charge increasing.
E) due to the effective nuclear charge increasing. The trend toward smaller atomic radii as one moves to the right in a period is due to the effective nuclear charge increasing.
Write the chemical formula for iron(III) bromide
FeBr₃
What is the correct IUPAC name for BaS?
barium sulfide