in the earth's atmosphere is made up about approximately 78 percent nitrogen and 21 percent oxygen.
Answer:hydrogen atomic no and mass no is 1. In hydrogen there is one electron ,one proton and zero neutron.
Explanation:
Neutron is zero because neutron
Nnumber =atomic no - mass no so 1-1=0.
C. Movement of the human body
Skeletal muscles gives us the ability to move
Prophase, metaphase, anaphase, and telophase.
Answer:D
Explanation:All things are made up of atoms but only living things are made of cells.
