sat suite question viewer

Expression of Ideas / Rhetorical Synthesis Difficulty: Easy

While researching a topic, a student has taken the following notes:

Some atoms contain an excess of neutrons.
Often, these neutrons form a “skin” on the atom’s surface.
An atom of lead-208 has a neutron skin.
The thickness of its neutron skin is approximately 0.28 trillionths of a millimeter.

The student wants to emphasize the thickness of lead-208’s neutron skin. Which choice most effectively uses relevant information from the notes to accomplish this goal?

The neutron skin surrounding an atom of lead-208 measures about 0.28 trillionths of a millimeter.

Atoms with excess neutrons will often acquire a neutron skin.

An atom of lead-208, like some other atoms, is surrounded by a neutron skin.

Neutrons surround the surface of an atom of lead-208.

Back question 113 of 182 Next

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182

Explanation

Choice A is the best answer. The sentence emphasizes the thickness of lead-208’s neutron skin, noting that it is about 0.28 trillionths of a millimeter thick.

Choice B is incorrect. The sentence makes a generalization about atoms, stating that atoms with excess neutrons will often acquire a neutron skin; it doesn’t emphasize the thickness of lead-208’s neutron skin. Choice C is incorrect. The sentence states that lead-208 has a neutron skin; it doesn’t emphasize the thickness of that skin. Choice D is incorrect. The sentence indicates that lead-208 is surrounded by neutrons; it doesn’t emphasize the thickness of lead-208’s neutron skin.