4. Atoms and Elements

Atomic Mass (Simplified)

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Which element has an average atomic mass of approximately $131.3$ amu?
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Silver has an atomic mass of 107.868 amu. The Ag-109 isotope (108.905 amu) is 48.16%. What is the amu of the other isotope?
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Which element has the lowest atomic mass on the periodic table?
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Which element has an average atomic mass of 106.42 amu?
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Which element has an average atomic mass of approximately $106.42$ amu?
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Which element has the lowest atomic mass?
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Which element has the higher average atomic mass, cadmium (Cd) or zinc (Zn)?
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Only three isotopes of magnesium exist on earth. ²⁴Mg is the most common form at 78.70% natural abundance with a mass of 23.98504 amu, ²⁵Mg has a 10.13% natural abundance, while ²⁶Mg has a natural abundance of 11.17% and a mass of 25.98259 amu. What is the mass of the ²⁵Mg isotope?
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Based on atomic mass, is mercury a heavier element than tin?
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Domanda del libro di testo
Indium consists of two isotopes, ¹¹³₄₉In and ¹¹⁵₄₉In. If the atomic mass for indium on the periodic table is 114.8, are there more atoms of ¹¹³₄₉In or ¹¹⁵₄₉In in a sample of indium?
1945
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Which of the following choices has the greatest atomic mass?
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1
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Domanda del libro di testo
Argon has three naturally occurring isotopes, with mass numbers 36, 38, and 40. d. Why is the atomic mass of argon listed on the periodic table not a whole number?
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In the simplified atomic mass scale, what is the mass of one atom of carbon-12?
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