1.

the atomic number of Na and Ca are 11 and 20 respectively what will be the number of electrons in an Na+ and Ca2+​

Answer»

The ATOMIC NUMBER and mass number of sodium are 11 and 23 respectively.This suggests that number of proton in sodium =11 and number of nucleons i.e. proton and neutrons in sodium =23. Thus, number of neutrons =12 and ALSO SINCE no. of PROTONS = no. of electrons =11So, they are similar



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