Antoine Lavoisier is known for which of the following? (Select all that apply)
a. the theory of general relativity
b. the theory of natural selection
c. the law of conservation of mass
d. studying gravity
e. discovering oxygen

Both c and e would be correct

Explanation:

Lavoisier studied the conversation of mass and discovered oxygen

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.