Question

What statement applies to the horizontal rows or periods in the periodic table?

A.
The properties are all the same.

B.
The elements have the same number of electrons.

C.
The properties change going across each row.

D.
The elements in each row combine easily.

Answer 1

Your answer would be, C.

The properties change going across each row!

Answer 2

The statement which applies to the horizontal rows or periods in the periodic table is that C. the properties change going across each row.
The elements in the same row have the same properties, which change depending on the row the element is in.