Answer:
Lithium's mass number would decrease by 1
Explanation:
4 protons are there in the atom
Answer:
C. water acts as a radiation shield to reduce the radiation level
Answer:
Second Earth's Atmosphere
The second atmosphere, which was the first to remain with the earth, was created by volcanic outgassing and comet ice. There was a lot of water vapor, carbon dioxide, phosphorus, and methane in this atmosphere, but absolutely no oxygen.
Explanation:
