two species X and Y have atomic number 18 and 20. calculate the number of electrons, protons and neutrons if they are having mass of 40 units. identify the type of species.
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X is argon Y is calcium no. of protons and electrons in X =18.
no. of protons and electrons in Y =20
no. of neutron in X is =22
no. of neutron in Y = 20
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