Answer:
20
Explanation:
number of protons+ number of neutrons= mass of atom
19+n=39
n=39-19=20
number of neutrons=20
HAHA I can’t stop laughing either
Fuels such as coal,oil,and natural gas were formed over millions of years from organic matter like plankton, plants, and other life forms
Answer:
thrue bap in spring season
Explanation: