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Ca has atomic no. 20 and atomic weight 40. Which of the following statements is not correct about Ca atom:
(1)The number of electrons is same as the number of neutrons
(2) The number of nucleons is double of the number of electrons
(3) The number of protons is half of the number of neutrons
(4)The number of nucleons is double of the atomic number
Ans: The number of protons is half of the number of neutrons
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