Answer:
The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.
Explanation:
<span>third layer of the canopy
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Energy flows through an ecosystem and cannot be recycled.
I believe its called flagella
I hope this helps
The heaviest bird of prey is the <span>condor. </span>
