The periodic table is arranged based on repeating chemical properties of the elements. Choose the correct element terms and match them as either being arranged or not arranged in order on the periodic table.
elemental color
electron configuration
chemical symbol
atomic mass
Arranged in order on periodic table
Not arranged in order on periodic table

look at the !

pleaze mark brainliest!

i believe it is 40–40–20%

explanation:

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-