Question

which of the following is the trend down a period?
A-the number of outer shell electrons decreases by one.
B-none of these
C-the number of complete electron shells stays the same
D-the number of outer shell electrons increases by one
E-the number of complete electron shells increases by one

Answer 1

E.

Answer 2

I think its D.

Answer 3

My bad. D is correct :D

Answer 4

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I think the question is actually badly worded @destinyrivera . Generally, when we're taking about the periodic table we use the terms "ACROSS A PERIOD" and "DOWN A GROUP". A period is one of the horizontal rows of elements, whilst a group is one of the vertical columns of elements.

"Down a Period" might mean either to be honest. If it actually means "Down a Group" then E is correct, as we're adding an new shell of electrons as we go down each time. However, if it means "Across a Period" then D is correct, as when we go from left to right across a row, we're only increasing the number of electrons by one each time (i.e. we're filling up the outer shell, rather than having a new shell altogether).

Sorry for the confusion, but I hope that helps you out! :)

Answer 5

I think its: E, because D is rather across the group.