Periodic Classification and Periodic Properties 1 Question 1
2. The element with $Z=120$ (not yet discovered) will be an/a
(2019 Main, 12 Jan I)
(a) transition metal
(c) alkaline earth metal
(b) inner-transition metal
(d) alkali metal
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Answer:
Correct Answer: 2. (c)
Solution:
- The element with $Z=120$ will be an alkaline earth metal. Recently, oganesson $(\mathrm{Og})$ with atomic number 118 is named by IUPAC is a noble gas and placed just two place before 120 . So, the general electronic configuration is represented as [noble gas]ns ${ }^{2}$ and element with $Z=120$ exist as an alkaline earth metal.
