I think that it is atmosphere but not 100% sure you might want to double check
Answer:
Go to bed at the same time every evening and wake up at the same time in the morning.
Explanation:
Answer:
Together,the number of protons and the number of neutrons determine an elements isotopes have slightly different mass numbers, the atomic mass is calculated by obtaining the mean of the mass numbers for its isotopes.
hope it is helpful....
