Question
The elements with atomic numbers 58 to 71 are called:(a) normal elements$\square$ (b) transition elements $\square$(c) lanthanides$\square$ (d) actinides
Step 1
The atomic number of an element is the number of protons in the nucleus of an atom of that element. It is denoted by the symbol Z. The atomic number uniquely identifies a chemical element. Show more…
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