GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which atom have only 1 outer shell
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Hydrogen
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Oxygen
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Helium
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Both a and c
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Explanation:
Detailed explanation-1: -Chemical properties of group 1 elements This forms positively charged ions . The ions have a stable arrangement of electrons, with a complete outer shell.
Detailed explanation-2: -The atomic number of carbon is six and has an electronic configuration: 2, 4. Hence, carbon has four electrons in its valence shell (outermost shell).
Detailed explanation-3: -Examples of some neutral atoms and their electron configurations are shown below. In this table, you can see that helium has a full valence shell, with two electrons in its first and only, 1n, shell. Similarly, neon has a complete outer 2n shell containing eight electrons.
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