Diameter of an atom is in the order of________________?
Correct answer: C. 0.2nm
- A. 0.2m
- B. 0.2mm
- C. 0.2nm
- D. 0.2pm
Explanation
An atomic diameter is typically about 0.1 to 0.3 nm, so 0.2 nm is the appropriate order of magnitude. The likely distractor is 0.2 pm, which is about 1,000 times smaller and is closer to nuclear dimensions than atomic dimensions.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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