Question

In the text box below, explain how the periodic table is organized. Be sure to use the following terms within your description: atomic number, protons, group(s), period(s), energy level(s), valence electron(s). Be sure to highlight each of these terms as you use them.

Answer 1

The periodic table is arranged by atomic weight and valence electrons. These variables allowed Mendeleev to place each element in a certain row( called a period) and column( called a group). The table comprises seven rows and 18 columns.

Step-by-step explanation:

Hope this helped :) This is just an introduction because there was no specified word limit.