Question

Which is true about each element in a period or horizontal row of the periodic table?

A.
Each element bonds with the element before it.

B.
Each element has one more isotope than the element before it.

C.
Each element has one more outer shell than the element before it.

D.
Each element has one more outer electron than the element before it.

Answer 1

It's D

Answer 2

Thank you :)