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Unit Test — Unit test Answers

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The diagram below shows some subatomic particles.Which of these statements best identifies the particle that is labeled with an X?

Question illustration
A
It is either a nucleus or a proton.
B
It is either a proton or a neutron.
C
It is either a neutron or an electron.
D
It is either an electron or a nucleus.
2
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When electrons are removed from the outermost shell of a calcium atom, the atom becomes

A
an anion that has a larger radius than the atom.
B
an anion that has a smaller radius than the atom.
C
a cation that has a larger radius than the atom.
D
a cation that has a smaller radius than the atom.
3

Which is a correct set of values of m for one of the subshells of n = 2?

A
–1, 0, 1
B
–1, –2, 0, 1, 2
C
–1, –2, –3, 0, 1, 2, 3
D
–1, –2, –3, –4, 0, 1, 2, 3, 4
4

Which of the following symbols would be included in the noble gas notation for an element that had valence electrons in the 5s subshell?

A
Ar
B
Kr
C
Xe
D
Rn
5

Which describes Ernest Rutherford’s experiment?

A
Positive particles are fired at gold foil. Most bounce back, but some pass through.
B
Negative particles are fired at gold foil. Most bounce back, but some pass through.
C
Positive particles are fired at gold foil. Most pass through, but some bounce back.
D
Negative particles are fired at gold foil. Most pass through, but some bounce back.
6

In which orbitals would the valence electrons for selenium (Se) be placed?

A
s orbital and f orbital
B
s orbital only
C
s orbital and p orbital
D
d orbital only
7

Which scientist is known for developing the planetary model of the atom?

A
Niels Bohr
B
Albert Einstein
C
Johannes Rydberg
D
Robert Millikan
8

In which orbitals would the valence electrons for selenium (Se) be placed?

A
s orbital and f orbital
B
s orbital only
C
s orbital and p orbital
D
d orbital only
9

Which element is the most reactive?

A
sodium
B
nickel
C
carbon
D
oxygen
10

Which characteristic is given by the angular momentum quantum number?

A
orbital size
B
orbital mass
C
orbital shape
D
orbital orientation
11

The diagram below shows some subatomic particles.Which of these statements best identifies the particle that is labeled with an X?

Question illustration
A
It is either a nucleus or a proton.
B
It is either a proton or a neutron.
C
It is either a neutron or an electron.
D
It is either an electron or a nucleus.
12

Which element is the most reactive?

A
sodium
B
nickel
C
carbon
D
oxygen
13

Which element is classified as an alkali metal?

A
Rb
B
Sr
C
Zr
D
Cl
14

Which set of numbers gives the correct possible values of l for n = 2?

A
0
B
0, 1
C
0, 1, 2
D
0, 1, 2, 3
15

Which scientist is known for developing the planetary model of the atom?

A
Niels Bohr
B
Albert Einstein
C
Johannes Rydberg
D
Robert Millikan
16

Which of the following symbols would be included in the noble gas notation for an element that had valence electrons in the 5s subshell?

A
Ar
B
Kr
C
Xe
D
Rn
17

How many valence electrons does aluminum (Al) have available for bonding?

A
1
B
2
C
3
D
4
18

Which is a correct set of values of m for one of the subshells of n = 2?

A
–1, 0, 1
B
–1, –2, 0, 1, 2
C
–1, –2, –3, 0, 1, 2, 3
D
–1, –2, –3, –4, 0, 1, 2, 3, 4
19

Hydrogen has three isotopes 1H, 2H, and 3H. What is the difference between these three isotopes?

A
The number of protons ranges from 1 to 3.
B
The number of electrons ranges from 1 to 3.
C
The number of neutrons ranges from 0 to 2.
D
The number of protons ranges from 0 to 2.
20

Which element has 32 protons in its nucleus?

A
phosphorus
B
cobalt
C
germanium
D
sulfur

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