CHEM 1305-Home-work-6
1)
NAME:
For representative elements, valence electrons are those electrons ________.
A) that are located closest to the nucleus
B) located in the outermost subshell
C) located in the outermost orbital
D) which occupy s orbitals only
E) which occupy s and p orbitals
2)
How many valence electrons does the representative element with the electron configuration
1s22s22p63s23p5 possess?
A) 5
B) 3
C) 6
D) 7
3) Which one of the following sets contains species that are all isoelectronic?
A) O, F, Ne
B) C+4, N-3, O-2 C) P-3, S-2, Ar
E) 2
D) Na, Mg, Al
4) Which of the following compounds contains an ion with a 2 charge?
A) AlP
B) GuS
C) Kbr
D) BaCl2
E) MgBr2
5) In the process of forming sodium nitride, Na3N, each sodium atom ________ electron(s) and each
nitride atom ________ electron(s).
A) loses one; gains two
B) loses three; gains one
D) loses one; gains three
E) gains two; loses one
C) loses three; gains three
6) An ionic bond forms between two atoms through ________.
A) sharing of electron pairs
B) transferring of electrons from metallic atoms to nonmetallic atoms
C) transferring protons from the nucleus of the nonmetal to the nucleus of the metal
D) each atom acquiring a negative charge
7) Which of the following pairs of elements would most likely form a covalent compound?
A) Na and Pb
B) F and S
C) Cu and Ar
D) Zn and K
E) La and Ni
8) Which statement is incorrect?
A) Ionic compounds generally contain metal and nonmetal elements.
B) Formulas of ionic compounds are written with the anion first, then the cation.
C) Cations and anions combine in the simplest ratio which achieves electrical neutrality.
D) The number of electrons lost by the cation(s) must equal the number gained by anion(s) in an
ionic compound.
9) Which one of the compounds below is most likely to be ionic?
A) GaAs
B) SrBr2
C) NO2
D) CBr4
E) H2O
Determine the formula for the compound formed between the following pairs of elements and/or ions.
10) Cs and P4
11) As and Cl2
12) OH and Fe3
13) O2 and F2
14) zinc and sulfur
15) Ni2 and C2H3O2
16) Ag and CO32
17) The formula of beryllium azide is Be(N3)2 (azide is a polyatomic ion). What is the formula of
scandium (III)azide?
A) Sc(N3)3
B) Sc(N3)2
C) ScN3
D) Sc3N3
18) For the compound CrO3, what is the correct Roman numeral in the name, chromium(__) oxide?
A) I
B) II
C) III
D) IV
19) Which of the following formulas in incorrect for a cobalt (III) compound?
A) CoCl3
B) CoCO3
C) Co2O3
E) VI
D) CoPO4
20) Which of the following ions is incorrectly named?
A) Cr6
chromium(VI) ion
B) Se2
selenide ion
C) Mg 
magnesium ion
D) C2H3O2
oxalate ion
E) ClO3 
chlorate ion
2

21) The chemical formula for heptasulfur dioxide is ________.
A) O2S
B) S7O2
C) SO2
D) S2O7
E) S7O
22) Which of the following is not an oxyacid?
A) arsenous acid
B) nitrous acid
D) sulfuric acid
E) hydrobromic acid
C) hypochlorous acid
23) The correct name for the pure, gaseous HI is ________.
A) iodate
B) hydrogen monoiodide
D) monohydrogen monoiodide
C) hydroiodic acid
E) hydrogen iodide
24) Which of the following compounds is not an acid?
A) H2S
B) HCN
C) HC2H3O2
25) Contains both monoatomic and polyatomic ions
A) ammonium cyanide
B) lithium nitride
C) magnesium nitrate
D) sulfur trioxide
D) PH3
E) HI