The characteristics that photosynthesis and combustion share are a] They both involve chemical change. b] They are both endothermic. c] They both start with chemical energy. d] They both occur in living organisms.
Answer:
proton
A proton is composed of two up quarks, one down quark, and the gluons that mediate the forces "binding" them together.
Physical change means - a change from one state ( solid,liquid or gas) to another state without change in chemical composition.
Answer:
This can be represented by the chemical equation: NaOH H2O→ OH- + Na.