Which of the following is wrong statement? (A) All the actinides are radioactive. (B) Technetium...

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Which of the following is wrong statement?
(A) All the actinides are radioactive.
(B) Technetium and promethium are synthetic elements.
(C) Chalcogens and halogens are \( p \)-block elements.
(D) The first member of the actinide series is actinium.
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