Midterm 1
1) Which of the following is an example of matter?
A) light
B) clothing
C) forgiveness
D) jealousy
Answer: B
2) Which of the following is a mixture?
A) cough syrup
B) iron
C) helium
D) sodium hydrogen carbonate
Answer: A
3) Each symbol denotes an element except
A) Co.
B) CO.
C) Cu.
D) C.
Answer: B
4) What is the chemical symbol for chromium?
A) C
B) Ca
C) Cl
D) Cr
Answer: D
5) The formula for sodium carbonate, Na2CO3, represents a compound composed of
A) two atoms of sodium, three atoms of carbon, and three atoms of oxygen.
B) two atoms of sodium, one atom of carbon, and three atoms of oxygen.
C) six atoms of sodium, two atoms of carbon, and six atoms of oxygen.
D) one atom of sodium and one atom of carbonate.
Answer: B
6) Which chemical symbol represents a metallic element?
A) Ar
B) Br
C) Ca
D) H
Answer: C
7) How many meters are there in one kilometer?
A) 10-3
B) 10-2
C) 10-6
D) 103
Answer: D
8) The smallest amount of an element that retains that element's characteristics is the
A) atom.
B) electron.
C) molecule.
D) neutron.
Answer: A
9) Which characteristics correctly describe a proton?
A) approximate mass 1 amu; charge +1; inside nucleus
B) approximate mass 5 × 10-4 amu; charge -1; outside nucleus
C) approximate mass 5 × 10-4 amu; charge +1; inside nucleus
D) approximate mass 1 amu; charge 0; inside nucleus
Answer: A
10) In a neutral atom the number of ________ is equal to the number of ________.
A) protons, electrons
B) protons, neutrons
C) neutrons, electrons
D) protons + electrons, neutrons
Answer: A
11) The atomic number of an atom containing 29 protons, 29 electrons, and 34 neutrons is
A) 5.
B) 29.
C) 34.
D) 58.
Answer: B
12) For the isotope 71Ga, Z = ________ and A = ________.
A) 31; 40
B) 71; 31
C) 71; 40
D) 31; 71
Answer: D
13) Atoms of
Cl contain ________ protons and ________ neutrons.
A) 17; 17
B) 17; 18
C) 18; 17
D) 35; 18
Answer: B
14) Which element is most likely to have chemical properties similar to those of potassium
(atomic number 19)?
A) Ar (atomic number 18)
B) Ca (atomic number 20)
C) Sc (atomic number 21)
D) Rb (atomic number 37)
Answer: D
15) Which of the following subshells consists of three orbitals?
A) 4s
B) 4p
C) 4d
D) 4f
Answer: B
16) The shell having n = 3 contains ________ subshells, ________ orbitals, and up to ________
electrons
A) 2, 4, 8
B) 3, 6, 12
C) 3, 6, 18
D) 3, 9, 18
E) 3, 12, 36
Answer: D
17) The element with the electron configuration 1s2 2s2 2p4 is ________.
A) Be
B) C
C) O
D) Si
Answer: C
18) The element with the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1 is
A) Rb.
B) Ar.
C) Ca.
D) K.
Answer: D
19) One characteristic of a cation is that
A) it has more protons than electrons.
B) it has equal numbers of protons and electrons.
C) it has more electrons than protons.
D) the number of neutrons is related to the number of electrons.
Answer: A
20) Which one of the compounds below is most likely to be ionic?
A) SrBr2
B) NO2
C) CBr4
D) H2O
Answer: A
21) Which of the following pairs will form ionic bonds with one another?
A) N, C
B) Na, Ca
C) Cs, Br
D) S, Cl
Answer: C
22) Which of the following ions does not have the same electron configuration as the noble gas
neon?
A) O-2
B) FC) Al+3
D) S-2
Answer: D
23) The charge on a sulfide ion is ________.
A) 3+
B) 2+
C) 0
D) 2Diff: 1
24) Which of the following elements is most likely to form an ion with a +2 charge?
A) Mg
B) Si
C) S
D) K
Answer: A
25) The correct Roman numeral for the chromium ion in the compound CrCl3 is
A) I
B) II
C) III
D) IV
Answer: C
26) The HCO3 -1 ion is called ________.
A) hydrogen carbonate
B) hydrogen carbide
C) carbide
D) carbonate
Answer: A
27) What is the formula for the ionic compound formed between lithium and bromide?
A) LiB
B) LiBr
C) Li2Br
D) LiBr2
E) Li+BrAnswer: B
28) What is the formula for the ionic compound formed between calcium and sulfur?
A) CaS
B) CaSi
C) Ca2S
D) CaS2
Answer: A
29) The formula for the compound chromium(II) nitrate is ________.
A) C2NO3
B) Cr2NO3
C) CrNO3
D) Cr(NO3)2
Answer: D
30) What is the name of Mg3(PO4)2?
A) trimagnesium diphosphate
B) magnesium diphosphate
C) trimagnesium phosphate
D) magnesium phosphate
Answer: D
31) Which is the correct formula for the ionic compound containing iron(III) ions and oxide
ions?
A) FeO
B) FeO2
C) Fe2O2
D) Fe2O3
Answer: D