Question

Calculate the number electrons,protons and neutrons in an atom of an element with atomic number 11 and mass number 23. write the electronic configuration

Answer 1

atomic no. 11.
total electrons =11
total protons =11
mass. no. = protons + neutrons
so. 23= 11 + neutrons
neutrons = 12
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Answer 2

element with atomic number 11 is sodium (Na) .
no.of electron = atomic no.= 11
no. of proton = atomic no.= 11
no.of neutron= mass no. - no. of proton= 23- 11 =12
atomic mass = no. of proton+ no. of neutrons=11+12=23
electronic configuration= 2,8,1