BPSC – Combined Competitive Examination · प्रश्न 63
Which of the following is the first artificially prepared element?
उत्तर दाखवा आणि स्पष्टीकरण
उत्तर: (B) Tc (Technetium)
स्पष्टीकरण
Technetium (Z = 43) was produced by Perrier and Segrè in 1937; its name means 'artificial'.
- (A) चूक
Wrong: a naturally occurring element.
- (B) बरोबर
Correct: technetium (1937) was the first element made artificially.
- (C) चूक
Wrong: a natural radioactive element.
- (D) चूक
Wrong: a naturally occurring element.