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10 questions
what is the atomic number of silver
what is the symbol of Tin
what is the sum of atomic numbers of Cadmium and Neon ?
symbol of (Antimony)
An
Ay
Cb
Sb
how many noble gases in the 1st five periods ?
5
6
7
8
what is the symbol of Ruthenium
Ru
Re
Ri
Rn
write the symbol of the element after switching the number
14
the atomic number of Zirconium is
symbol of Rubidium
Rb
Rm
Rp
Rd
atomic number of Palladium + that of Beryllium
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