Osmium has six naturally occurring isotopes. When the most abundant isotope has this symbol:
The atomic number (Z), mass number (A), number of neutron (n) and number of electrons are:
A) Z=76, A=114, n=190, e=76
B) Z=190, A=76, n=114, e=76
C) Z=76, A=76, n=114, e=82
D) Z=76, A=190, n=114, e=70
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