Wood logs will burn at a steady rate when used in a campfire,
but sawdust may explode if it
becomes ignited by a spark.
Which factor best accounts for
this difference?
A Concentration of gases
B Comparative surface area
C Relative temperature
D Presence of catalysts

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.