101A-Exam1

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Published on 31 Jan 2019
School
ASU
Department
Chemistry
Course
CHM 101
Professor
CHM-101-A Exam 1 Version 1
September 12, 2006
Copyright 2006 by James P. Birk
1. Which of the following does not apply to a chemical compound?
A. A chemical compound consists of two or more elements.
B. The elements in a compound are combined in definite proportions.
C. The characteristics of the compound are different from the characteristics of the elements from
which it is made.
D. Compounds can be separated into their constituent elements using only physical methods.
E. A chemical compound can also be classified as a pure substance.
2. A combination of two or more substances that can be separated by using only a physical process is:
A. an element.
B. a substance.
C. a composition.
D. a compound.
E. a mixture.
3. Which image(s) in the figure represents a mixture of two elements?
A. image D
B. images C and D
C. image B
D. image A
E. image C
4. The symbol for the element potassium is__________.
A. Po
B. Pa
C. Pt
D. P
E. K
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CHM-101-A Exam 1 Version 1
September 12, 2006
Copyright 2006 by James P. Birk
5. The physical state of matter which does not have a characteristic shape, but takes on the shape of the
filled part of its container, is:
A. liquid.
B. gas.
C. solid.
D. liquid or gas.
E. solid or liquid.
6. The proprietor of a rock shop insists that a nugget is pure gold. If the nugget occupies a volume of
5.40 mL, what would its mass have to be if it were truly pure gold? (dgold = 19.3 g/mL)
A. 104 g
B. 13.9 g
C. insufficient information given
D. 3.57 g
E. 0.279 g
7. Which of the following is not an example of a physical property?
A. Helium is a gas at room temperature.
B. Sand is more dense than water.
C. Water is colorless.
D. The boiling point of acetone is 56oC.
E. Copper gets a greenish coating on it when exposed to moist air.
8. A 43 g serving of a chocolate candy has 2.10 ×102 Calories. Convert this energy to units of joules.
A. 5.02 ×104 J
B. 8.79 ×103 J
C. 50.2 J
D. 8.79 ×105 J
E. 879 J
9. Which of the following is not part of Dalton's atomic theory?
A. Atoms combine in whole-number ratios to form chemical compounds.
B. Chemical reactions involve a rearrangement of the atoms in the starting materials.
C. All atoms of a given element have identical mass and chemical properties.
D. All matter is composed of small indivisible particles called atoms.
E. Atoms of one element can be changed to atoms of another element in a chemical reaction.
10. The subatomic particles studied by chemists that make up the atom include all of the following
except the:
A. alpha particle and neutron.
B. neutron.
C. alpha particle.
D. electron.
E. proton.
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CHM-101-A Exam 1 Version 1
September 12, 2006
Copyright 2006 by James P. Birk
11. Which of the following statements regarding the nucleus of the atom is incorrect?
A. The nucleus contains most of the mass of the atom.
B. The nucleus contains the electrons and the protons.
C. The nucleus contains the protons and most of the mass of the atom.
D. The nucleus is the central core of the atom.
E. The nucleus contains the neutrons.
12. The number of protons and neutrons in an atom of magnesium-25 is:
A. 25 protons and 12 neutrons.
B. 12 protons and 25 neutrons.
C. 12 protons and 13 neutrons.
D. 25 protons and 37 neutrons.
E. 13 protons and 12 neutrons.
13. The isotope symbol for an ion that has 11 protons, 12 neutrons, and 10 electrons is:
A.
B.
C.
D.
E.
14. On the planet Invertios, boron has two isotopes as follows:
Estimate the relative atomic mass of boron on Invertios.
A. 10.8 amu
B. 11.0 amu
C. 10.2 amu
D. 10.5 amu
E. 10.0 amu
15. Which of the following statements about the modern periodic table is incorrect?
A. The elements are arranged in rows and columns to emphasize periodic properties.
B. Each group has a Roman numeral and a letter associated with it.
C. The periodic table is arranged by increasing atomic mass.
D. A horizontal row of elements is called a period.
E. Elements in the same vertical column are called groups or families.
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