2. Atoms & Elements

Atomic Mass

객관식
Which of the following is closest to the atomic mass of silver (Ag)?
115
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객관식
What is the atomic mass of sodium (Na) as listed on the periodic table?
193
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객관식
Element m has two naturally occurring isotopes: m-10 (10.01 amu, 19.6% abundance) and m-11 (11.01 amu, 80.4% abundance). What is the average atomic mass (in amu) of element m?
114
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객관식
Which nonmetallic element in period 3 of the periodic table has an atomic mass closest to 32?
151
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미해결 질문
Based on these data, what is the average atomic mass of element B? 10.01 10.51 10.81 11.01
1018
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객관식
Which of the following values is closest to the mass of a single carbon-12 atom?
106
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객관식
Which of the following is closest to the mass of a single atom of lithium (Li) in grams?
109
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객관식
Which of the following is the number of protons found in a neutral atom of silver (Ag)?
94
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객관식
Calculate the average mass, in grams, of one platinum atom given that the atomic mass of platinum is approximately 195.08 amu.
595
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객관식
Which of the following is closest to the atomic mass of the element fluorine?
111
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미해결 질문
Lithium has an elemental atomic mass of 6.941 u and has two naturally occurring isotopes, ⁶Li and ⁷Li. Their masses are 6.0151 u and 7.0160 u respectively. What are the natural abundances (to 2 decimal places in percentage) of the isotopes of lithium?
2851
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객관식
Which of the following is most likely true of an atom with a mass of 15 amu?
121
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객관식
Which of the following elements has an atomic mass of 106.42?
131
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객관식
Which of the following is closest to the atomic mass of xenon (Xe)?
103
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객관식
Which of the following is closest to the atomic mass of nitrogen?
98
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