An element Y has the proton number 18.The next element in the Periodic Table is an element Z.WhiCh statement is correct?
A.
Element Z has one more electron in its outer shell than element Y.
B.
Element Z has one more electron shell than element Y.
C.
Element Z is in the same group of the Periodic Table as element Y.
D.
Element Z is in the same period of the Periodic Table as element Y.