Answer:A and B if one choice only then it is B
Explanation:
The transitive property of equality is what I believe it is. A = B and B = C therefore A = C
Answer:
Atoms of the same chemical element do not always have the same mass because, although the number of protons in the nucleus is the same for all atoms of the same element, the number of neutrons is not. Most elements as they occur naturally on earth are mixtures of several isotopes.
Explanation:
