Question

Neculeus of an atom has 5 protons and 6 neutrons. What would the atomic no. Mass no. And the no. Of electrons and the no. Of valency electrons per atom of this element

Answer 1

atomic no. would be 5 because no. of protons is equal to atomic no.


mass no.is 5+6=11 to find it just add the no. of protons and neutrons


no. of electrons is 5 becoz no. of protons is equal to no. of electrons.


the element is boron therefore the electronic configuration is 2,3


therefore the valency is 3...


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Answer 2

Mass no. = proton + neutron
= 5+6 = 11
Atomic no. = total proton in the nucleus = 5.
No. of electron = No. of proton = 5.
Valence electron = 3.