BPSC – Combined Competitive Examination · ప్రశ్న 63
Which of the following is the first artificially prepared element?
సమాధానం చూపించు & వివరణ
సమాధానం: (B) Tc (Technetium)
వివరణ
Technetium (Z = 43) was produced by Perrier and Segrè in 1937; its name means 'artificial'.
- (A) తప్పు
Wrong: a naturally occurring element.
- (B) సరైనది
Correct: technetium (1937) was the first element made artificially.
- (C) తప్పు
Wrong: a natural radioactive element.
- (D) తప్పు
Wrong: a naturally occurring element.