Cassiterite is an ore of_______?
Correct answer: D. Sn
- A. Mn
- B. Ni
- C. Sb
- D. Sn
Explanation
Cassiterite is tin(IV) oxide, SnO2, so it is an important ore of tin, Sn. The likely mistake is choosing Sb, because antimony is also commonly associated with sulfide ores, but cassiterite specifically contains tin.
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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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