Multiple Choice
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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4. Atoms and Elements
Atomic Mass (Simplified)
Multiple Choice
Which element has the lowest atomic mass?
A
Oxygen (O)
B
Hydrogen (H)
C
Helium (He)
D
Carbon (C)
Verified step by step guidance1
Understand that atomic mass refers to the average mass of atoms of an element, measured in atomic mass units (amu), and it generally increases with the number of protons and neutrons in the nucleus.
Recall the atomic masses of the given elements: Hydrogen (H), Helium (He), Carbon (C), and Oxygen (O). These values are typically found on the periodic table.
Compare the atomic masses of each element: Hydrogen has an atomic mass close to 1 amu, Helium about 4 amu, Carbon about 12 amu, and Oxygen about 16 amu.
Identify the element with the smallest atomic mass by selecting the one with the lowest numerical value from the comparison.
Conclude that Hydrogen (H) has the lowest atomic mass among the listed elements because it has the fewest protons and neutrons.
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