The chemical composition of cinnabar is__________________?
Correct answer: C. HgS
- A. ZnS
- B. PbS
- C. HgS
- D. FeS
Explanation
Cinnabar is the red mineral form of mercury(II) sulphide, with the formula HgS. The other sulphides belong to zinc, lead and iron, not mercury. The likely trap is PbS because galena is also a well-known sulphide mineral, but galena is not cinnabar.
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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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