The element Uuu has atomic number
Correct answer: C. 111
- A. 102
- B. 101
- C. 111
- D. 110
Explanation
The element Uuu refers to Unununium, a placeholder name used by IUPAC for the element with atomic number 111, which is now known as Roentgenium (Rg). The other options refer to different elements: 102 is Nobelium (No), 101 is Mendelevium (Md), and 110 is Darmstadtium (Ds).
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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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