General Science Chemistry Classification of Elements and Periodicity in Properties

खालीलपैकी ब्रासची योग्य रचना कोणती?

1

Cu - 50%; Sn - 50%

2

Cu - 60%; Zn - 40%

3

Zn - 70%; Sn - 30%

4

Fe - 40%; Ni - 60%

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