This bluish-whit metal is extremely hard and brittle, and is used almost entirely to make the very hard alloys used in fountain pen nibs, phonograph needles, and instrument pivots.

9th-class-result-2022

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This bluish-whit metal is extremely hard and brittle, and is used almost entirely to make the very hard alloys used in fountain pen nibs, phonograph needles, and instrument pivots.

Incorrect

Rubidium

Correct

Osmium

Incorrect

Hafnium

Incorrect

Cadmium

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