an atom of an element has 7 electrons in its 2 shells, name the element and write it's atomic number
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Class 11
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>>Classification of Elements and Periodicity in Properties
>>Modern Periodic Law and Periodic Table
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An element X has 7 electrons in its L shell. What is true about the element X?
It can accept an electron to acquire noble gas configuration.
If the number of electrons in the L shell of X is 7, then its atomic number is 9 (as 2 electrons are in the K shell and 7 electrons are in L shell).
Thus, the number of protons in X is 9 (equal to a number of electrons).
It can acquire a noble gas configuration by accepting one electron to complete its octet as it has 7 valence electrons.
Hence, option B and D are correct.
Answer:
above answer is correct
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