The trends, in melting points of the elements of the 3rd period, are depicted in the figure below.The sharp decrease observed from 'Si' to 'P' is due to
Correct answer: B. Change in bonding and structure of two elements
- A. Decrease in atomic radius from 'Si' to 'P'
- B. Change in bonding and structure of two elements
- C. Different universities of two elements
- D. Increase in electron density from 'Si' to 'P'
Explanation
From Si onwards, the bonding and structure of the element change from covalent to weak van der Waal forces that cause the decrease in melting point, as shown in the diagram. Options A, C, D: As explained above, they are incorrect options
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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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