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05-06-2021
Chemistry

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Element X contains 4 electrons in its outer shell and 125 neutrons in its nucleus. what is element X? (beryllium/carbon/tin/lead)

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unknown767 unknown767

05-06-2021

Answer:

lead

Explanation:

As it is in group 4 so 4 electron In its outer shell

and you can find number of neutrons by taking

mass number - atomic number

207.2-82=124.2=125

hope it make sense:)

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