Which of these reactions is a combustion reaction? 1. burning wood 2.decomposition of water 3. production of food by plants with the of the sun's energy 4.rotting of fruits and vegetables

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

he would use the colour black