the atom of an element has 9 protons, 9 electrons and 10 neutrons. i) what is the atomic number of the element? ii) what is the mass number of thr element?
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No of protons = Atomic number = 9
Atomic number = 9
Mass number = No of protons + No of neutrons
= 9 + 10
Mass number = 19
Atomic number = 9
Mass number = No of protons + No of neutrons
= 9 + 10
Mass number = 19
Answered by
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a) the atomic number = no. of protons = 9
so, atomic number = 9
b) the mass number = no.of protons + no.of neutron= 9 +10= 19
so, atomic number = 9
b) the mass number = no.of protons + no.of neutron= 9 +10= 19
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