Practice mt 1
1) Which factor determines the state of matter in which a substance exists?
A) amount B) color C) density D) odor E) temperature
2) Which of the following is a pure substance?
A) root beer B) bleach C) eggs D) gasoline E) neon
3) Which chemical symbol represents a metalloid?
A) Ge B) C C) Al D) Zn E) Ar
4) Which of the following describes air?
A) pure substance - compound
B) mixture - homogeneous
C) mixture - heterogeneous
D) pure substance - element
E) none of the above
5) The formula for aluminum carbonate, Al2(CO3)2 , represents a compound composed of
A) two atoms of aluminum, two atoms of carbon, and three atoms of oxygen.
B) two atoms of aluminum, two atom of carbon, and six atoms of oxygen.
C) four atoms of aluminum, one atoms of carbon, and six atoms of oxygen.
D) two atoms of aluminum and two atom of carbonate.
E) four atoms of aluminum and two atoms of carbon and six atoms of oxygen.
6) Which symbol does not denote a compound?
A) CO2 B) CCl4 C) C2H4 D) H2 E) CaCO3
7) The prefix "milli" and the prefix "micro" correspond, respectively, to the factors:
A) 103 and 106
B) 10-3 and 10-6
C) 10-3 and 10-12
D) 10-6 and 10-9
E) 10-1 and 10-6
8) The amount of matter in an object is its
A) density.
B) mass.
C) specific gravity.
D) volume.
E) weight.
9) Which of the following measurements has three significant figures?
A) 1,207 g B) 4.250 g C) 0.06 g D) 0.0250 g E) 0.03750 g
10) What is the total length of two pieces of tubing which measure 8.5 cm and 3.222 cm? Express the
answer to the
correct number of significant figures.
A) 11.3 cm B) 11.72 cm C) 11.722 cm D) 11.7 cm E) 12 cm
11) How many grams are contained in 1.20 pounds?
A) 544 g B) 378 g C) 2646 g D) 2.6 g E) 1.20 g
12) An atom containing 47 protons, 47 electrons, and 60 neutrons has a mass number of
A) 13. B) 47. C) 60. D) 107. E) 154.
13) Which group of elements contains only non-metals?
A) Mg, Ca, Sr B) V, Cr, Mn C) Cl, Ar, K D) P, As, Se E) C, S, I
14) An s-block element in the 5th Period is
A) Y. B) As. C) Sr. D) Mo. E) Ag.
15) How many electrons can occupy the shell having n = 4?
A) 2 B) 8 C) 10 D) 18 E) 32
16) Elements in the Periodic Table are arranged according to
A) alphabetical order.
B) atomic number.
C) atomic weight.
D) date of discovery.
E) number of neutrons.
17) The element which has four valence electrons is ________.
A) H B) Na C) Mg D) Si E) S
18) When an atom donates an electron, that electron
A) is lost for all time.
B) is acquired by another atom which becomes an anion.
C) is acquired by another atom which becomes a cation.
D) neutralizes a proton to form a neutron.
19) Groups, or families, on the periodic table are:
A) named for the first elements in the series; such as "actinides"
B) vertical columns of elements with similar properties
C) extremely reactive with each other
D) elements that all occur naturally in the same state
E) horizontal rows of elements with increasing atomic numbers
20) How many neutrons are in the nucleus of an atom of iron-56?
A) 82 B) 26 C) 30 D) 56 E) 8
21) Which of the following electron configurations is most stable?
A) 1s22s2 B) 1s22s22p2 C) 1s22s22p3 D) 1s22s22p4 E) 1s22s22p6
22) How many energy sublevels exist within the 3rd energy level?
A) 1 B) 2 C) 3 D) 4 E) 5
23) What is the most likely charge on an ion formed by an element with a valence electron configuration
of ns2np1?
A) 3- B) 1- C) 1+ D) 3+ E) 5+
31) The charge on a sulfide ion is __________.
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 E) Br
25) What is the formula of a compound formed by the ions M2+ and X3-?
A) M2X3 B) M3X2 C) MX3 D) M2X
26) Which of the following colors of light has the shortest wavelength?
A) green B) red C) violet D) yellow
27) Which element is most likely to form three bonds?
A) C B) Si C) P D) S
28) A triple bond involves the sharing of ________ pairs of electrons between the atoms
A) 1 B) 2 C) 3 D) 4
29) The total number of valence electrons in a molecule of SOF2 is ________.
A) 26 B) 24 C) 18 D) 20
30) How many double bonds are there in a molecule of SF2?
A) 0 B) 1 C) 2 D) 3