Would an ion weigh more, less, or about the same as the corresponding atom? (Example: mass of Ca vs. Ca 2+) Why?
Understand the Problem
The question is asking how the mass of an ion compares to the mass of its corresponding neutral atom, specifically using calcium as an example. The high-level approach to solve it involves explaining the relationship between atomic weight and ionic charge, and how gaining or losing electrons affects mass.
Answer
About the same
The final answer is that an ion will weigh about the same as the corresponding atom.
Answer for screen readers
The final answer is that an ion will weigh about the same as the corresponding atom.
More Information
The mass of an atom is primarily determined by the protons and neutrons, both of which are significantly more massive than electrons. Since electrons have negligible mass, the removal or addition of electrons to form ions does not significantly change the mass.
Tips
A common mistake is to neglect the fact that electrons have negligible mass compared to protons and neutrons.
Sources
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