Elements are represented by ………… (symbols/ numbers).
Name the elements represented by the following symbols:
Hg, Pb, Au, Ag, Sn.
An element is represented by symbol X1531.
What is the mass number and atomic number of element X.
Write the full form of IUPAC. Name the elements represented by the following symbols :
Au, Pb, Sn, Hg.
Which of the following symbols represents the atomic number of an element ?