The following graph shows a physical property along the period 3 elements. Which physical property is shown in the graph?
Correct answer: C. Atomic Radius
- A. Electron Affinity
- B. Non-metallic character
- C. Atomic Radius
- D. Melting point upto group IV
Explanation
The atomic radius decreases as we move along the period from left to right. Because, the shell remains the same among all the elements (since they're all in the same period) and, since the proton number increases the force on attraction increases on the valence shell, hence the radius decreases along the period.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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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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