OLD UNIT 3 TEST #1 (REG. CHEM.)
Part 1 - Matching
1.)
Chadwick
(A) discovered the nucleus
2.)
Democritus
(B) first to get his ideas about atoms published
3.)
Thomson
(C) discovered the neutron
4.)
5.)
Part 2 - Multiple Choice
6.) The mass of the
neutron is
(A) about the same as that of a
proton (B)
about the same as that of an electron
(C) double that of a
proton
(D) double that of an electron
7.) Most of the
volume of an atom is made up of the
(A)
nucleus (B)
nuclides (C)
electron cloud
(D) protons
8.) As the atomic
masses of the elements on the Periodic Table increase, the number of atoms in
one mole of each element
(A)
decreases (B)
increases (C)
remains the same
(D) becomes a negative number
9.) As the mass
number of the isotopes of a particular element increases, the number of protons
in each isotope of the element
(A)
decreases (B)
increases (C)
remains the same
(D) varies unpredictably
10.) The electric
charge and mass number of a neutron are, respectively,
(A) +1 and
1 (B) -1 and
1 (C) +1 and
0 (D) 0 and 1
11.) Neon has an
atomic number of 10. Calcium has an atomic number of 20. Compared
to a mole of neon, a
mole of calcium contains
(A) twice as many
atoms (B) an
equal number of
atoms (C)
half as many atoms
(D) 10 times as many
atoms (E) 20 times as many atoms
12.) Atoms of the
same element can differ in
(A) chemical
properties
(B) mass
number (C)
atomic number
(D) number of protons
13.) What is the
approximate mass of an isotope of lithium that has three electrons, three
protons, and five
neutrons?
(A) 5 amu
(B) 6 amu
(C) 7 amu
(D) 8 amu
(E) 11 amu
14.) Subtracting the
atomic number from the mass number gives the number of
(A)
protons (B)
neutrons (C)
electrons (D)
energy levels
15.) An element
consists of atoms, all of which have nuclei containing the same number of
(A)
neutrons (B)
electrons (C)
protons (D)
protons plus neutrons
16.) The smallest
unit of an element that can exist either alone or in combination is the
(A)
proton (B)
atom (C)
electron (D)
molecule
17.) How many
neutrons does fluorine-17 have in its nucleus?
(A)
9 (B)
8 (C)
7 (D) 6
18.) What is the
mass number of an atom that has 10 protons, 12 neutrons, and 10 electrons?
(A)
2 (B)
10 (C)
20 (D)
22 (E) 32
19.) For the element
carbon, the numerical expression "12.011" is its
(A) mass
number (B)
atomic number
(C) average atomic mass
20.) The atomic
number of oxygen indicates that there are eight
(A) protons in the nucleus of an oxygen
atom (B)
oxygen nuclides
(C) neutrons outside the
atom's
nucleus
(D) energy levels moving about the nucleus
Part 3 - Tell whether the
following describes
(A) a
proton (B) a
neutron
or (C) an electron
21.) The number of this particle in the atom determines what element it is
22.) This particle has a mass that is about 1800 times less than 1 amu
23.) This particle has a negative charge
24.) The number of this particle is different in isotopes of the same element
25.) This particle is neutral