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Biology Final

Question:
Calcium has an atomic number of 20 and an atomic mass of 40. Therefore, a calcium atom must have
A) 20 protons.
B) 40 electrons.
C) 40 neutrons.
D) A and B only
E) A, B, and C
Answer:
A. 20 protons
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Last update by mayurcooled on 04/23/2014
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Biology Final
Biology Final
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Biology 111 Exam 1 Ch. 1, 2, 3, 2011
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Question: Calcium has an atomic number of 20 and an atomic mass of 40. Therefore, a calcium atom must have A) 20 protons. B) 40 electrons. C) 40 neutrons. D) A and B only E) A, B, and C
Answer: A. 20 protons