Question

Q.27 The nucleus of an atom has 5 protons and 6 neutron. What would be the
a.atomic number
b. mass number
c.The number of valence electrons, per atom of this element.
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Answer 1

Answer:

Atomic number=5(Atomic number=number of protons)

Mass number=number of protons+number of neutrons

5+6

11

Number of valence electrons=3(Electronic configuration=2,3)