1 answer:
Answer:
Number of protons plus the number of neutrons.
Explanation:
Most of an atom's mass is in its nucleus. The nucleus is made up of protons and neutrons.
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in the earth's atmosphere is made up about approximately 78 percent nitrogen and 21 percent oxygen.
<span>D) Daughter cells contain the same genetic information as parent cells.</span>
The prokaryotic cells contain more DNA
