Question

Elements are placed into the same period on the periodic table of the elements because they ___________.

Question 1 options:

form the same type of chemical bonds.

form the same type of isotopes.

have the same chemical properties.

have the same number of electron energy levels.

Answer 1

Have the same number of electron energy levels

Step-by-step explanation:

Like, every element in the top row has one electron, the second row has two electrons, etc.