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Question
If an atom has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass? What is the name of this element?A) atomic mass, 137 amu; Barium
B) atomic mass, 99 amu; Technetium
C) atomic mass, 99 amu; Radon
D) atomic mass 142 amu; Einsteinium
Answer
This answer is hidden. It contains 1 characters.
Related questions
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