2.1 atoms Flashcards
1
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A
2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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12
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13
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14
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15
Q
What is the the number of protons, neutrons and electrons of an element of boron that has -2 charge and a mass of 12 amu
A
5 protons
7 electrons
7 neutrons
