How are elements arranged in the modern periodic table?

Elements that are on the periodic table are arranged by by atomic number, electron shells, and valence electrons. These elements are also arranged by families and groups. Families and groups go vertical on periodic table and they have the same number of e,evtrons In the outer shell and same number of valence electrons.

ammonium chloride & tallow

force tends to be low and long diustance masses are high