elements a. b c
mass no. 23. 20. 35
neutrons. 12. 10. 18
write atomic number and electric configuration of ABC
to which groups do abc belong
to which periods ABC belong
which is alkali,noble gas,halogen
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atomic no. of a = 11 (sodium) b = 10(neon) c=17 (chlorine )
electric comfiguration of element a= 2,8,1 b=2,8 c= 2,8,7
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