Find out the total number of representative elements among the given elements:

Question

Canvas Classes · Accepted Answer

Strategy:
 Representative elements consist of the -block and -block elements (Groups 1, 2, and 13–18).

Step 1: Categorize each element
- : All are -block metals.
-  (Tellurium): -block (). (Correct)
-  (Radium): -block (). (Correct)
-  (Polonium): -block (). (Correct)

Total: 3 elements.

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