Elements can be organized on a. the atoms table. b. the multiplication table. c. the periodic table.

answer; i believe the answer is hydraulic action;

i thinking chemical change

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%