UNIT 3 TEST #3 (HONORS CHEM.)
1. Nickel - 60
(atomic number 28) has
(A) 28
neutrons (B)
32 neutrons (C) 60
neutrons (D) 88 neutrons
2. The discovery of
the electron resulted from experiments using
(A) gold
foil (B)
cathode rays (C)
neutrons (D) alpha particles
3. The average
atomic mass of an element depends on both the masses of its isotopes and each
isotope's
(A) atomic
number (B) radiactivity
(C) percent abundance
(D) mass number
4. As the mass number of the isotopes of an element increases,
the number of protons
(A)
decreases (B)
increases (C)
remains the same (D) varies
unpredictably
5. To determine the molar
mass of an element, one must know the element's
(A) Avogado's
number (B) atomic
number (C) number of
isotopes (D)
average atomic mass
6. The mass of a
sample of nickel (atomic mass 58.69 amu) is 176.07
g. It contains
(A) 1.7607 x 1024
atoms (B) 1.806 x 1024 atoms
(C) 5.869 x 1023
atoms
(D) 5.869 x 1024 atoms
7. An atom is
electrically neutral because
(A) neutrons balance the protons and
electrons
(B) nuclear forces stabilize the
charges
(C) the
numbers of protons and electrons are equal
(D) the numbers of protons and
neutrons are equal
8. Chlorine has an
atomic number of 17 and a mass number of 35. It has
(A) 17 protons, 17
electrons, & 18 neutrons
(B) 35 protons, 35 electrons, & 17 neutrons
(C) 17 protons, 17 electrons, &
52 neutrons (D) 18 protons, 18
electrons, & 17 neutrons
9. The number of
atoms in 1 mole of carbon is
(A) 6.022 x 1022
(B) 6.022 x 1023
(C) 5.022 x 1022 (D) 5.022
x 1023
10. A nuclear
particle that has about the same mass as a proton, but with no electrical
charge, is called a(n)
(A)
nuclide (B)
neutron (C)
electron (D) isotope
11. An aluminum
isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass
number is
(A)
13 (B)
14 (C) 27
(D) 40
12. Who discovered
the nucleus by bombarding gold foil with positively charged particles and
noting that some
particles were widely deflected?
(A)
13. The atomic
number of oxygen, 8, indicates that there are eight
(A) protons in the
nucleus of an oxygen atom
(B) oxygen nuclides
(C) neutrons outside the oxygen
atom's nucleus (D) energy
levels in the oxygen atom's nucleus
14. The nucleus of
an atom has all of the following characteristics EXCEPT that it
(A) is positively
charged (B) contains nearly all of
the atom's mass
(C) is very
dense
(D) contains nearly all of the atom's volume
15. An electrically
neutral atom of mercury (atomic number 80) has
(A) 80 neutrons and 80
electrons (B)
40 protons and 40 electrons
(C) 80 protons and 80
neutrons
(D) 80 protons and 80 electrons
16. Which of the
following is NOT part of
(A) Atoms cannot be divided,
created, or destroyed.
(B) The number of
protons in an atom is its atomic number.
(C) In chemical reactions, atoms are
rearranged.
(D) All matter is composed of
extremely small particles called atoms.
17. A prospector
finds 39.39 grams of gold (atomic mass 196.9665 amu).
She has
(A) 1.20 x
1023 atoms (B) 2.30 x 1023
atoms (C) 4.30 x 1023
atoms (D) 6.02 x 1023
atoms
18. The atomic
theory proposed by Dalton
(A) has been totally
discarded
(B) has been expanded and modified
(C) has been accepted unchanged to
the present day
(D) has been found to be false
19. Phosphorus - 33
(atomic number 15) contains
(A) 33
protons (B)
18 neutrons (C) 33
neutrons (D) 18 protons
20. An Avogadro's
constant amount of any element is equivalent to
(A) the atomic number of that
element (B)
the mass number of that element
(C) 6.022 x
1023
particles
(D) 100 grams of that element
21. If each atom of
element D has 3 mass units and each atom of element E has 5 mass units, a
chemical molecule
composed of one atom each of D and E has
(A) 15 mass
units (B) 2 mass
units (C) 35 mass
units (D) 8 mass
units
22. According to the
law of conservation of mass, when sodium, hydrogen, and oxygen react to form a
compound,
the mass of the compound is ___ the sum of
the masses of the individual elements.
(A) equal to
(B) greater than (C) less
than (D) either greater than or less
than
23. The mass of
exactly 5 moles of cesium (atomic mass 132.9 amu) is
(A) 664.5
grams (B) 132.9
grams (C) 6.022 x 1023
grams (D) 5 grams
24. A quantity of
sodium (atomic mass 22.99 amu) contains 6.022 x 1023
atoms. The mass of the sodium is
(A) 6.022 x 1023
grams (B) 3.88
grams (C)
22.99 grams (D) not determinable
25. The mass of 2.50
moles of calcium atoms (atomic mass 40.08 amu) is
approximately
(A) 10.0
grams (B) 42.5
grams (C) 100.
grams (D) 250. grams
26. The mass of
exactly 1 mole of chromium (atomic mass 51.996 amu)
is
(A) 12
grams (B) 198
grams (C)
51.996 grams (D) 6.022 x 1023
grams
27. As the atomic
masses of the elements in the periodic table increase, the number of atoms in 1
mole of each
element
(A)
decreases (B)
increases (C)
remains the same (D) becomes a
negative number
28. What is the
number of moles of chemical units represented by 9.03 x 1024 units?
(A) 1.50
moles (B) 9.03
moles (C) 10.0
moles (D)
15.0 moles
29. The behavior of
cathode rays produced in a glass tube containing gas at low pressure led
scientists to conclude
that the rays
(A) were not composed of
matter
(B) were composed of positively charged particles
(C) were composed
of negatively charged particles (D)
were composed of uncharged particles
30. In
(A) bounced
back
(B) passed through the foil
(C) were absorbed by the
foil (D) combined
with the foil
31. Most of the volume of
an atom is occupied by the
(A)
nucleus (B)
nuclides (C)
electron cloud (D) protons
32. Zn-66 (atomic
number 30) has
(A) 30
neutrons (B) 33
neutrons (C) 36
neutrons (D) 96 neutrons