SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of these electronic structures belongs to a noble gas?
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2
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2, 2
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2, 8, 2
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None of the above
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Explanation:
Detailed explanation-1: -Electronic configuration 2, 8 is the configuration of neon noble gas.
Detailed explanation-2: -Helium (He, Z=2). Helium is a colorless, odorless, unreactive gas which liquefies at-268.97°C (4.18 K). The name “helium” is derived from the Greek word for the Sun, helios.
Detailed explanation-3: -The atomic number of Helium is Z = 2. The electronic configuration is, 2. Therefore, Helium is a noble gas with two valence electrons.
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