Element X has 7 protons.Y has more electron shells than X.
Element Y has 8 more protons than X.
Which statement about element Y is correct?
Y has more electron shells than X.
2 )
Y has more electrons in its outer shell than X.
3 )
Y is in a different group of the Periodic Table from X.
4 )
Y is in the same period of the Periodic Table as X.
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