in which element:
a.
is the third energy level first completely filled with electrons.
does the first 7s electron appear.
c.
is the 5f subshell first full.

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

Fossil fuels are organic compounds that are made from