Q-1 --------- metal that is used to harden stell. Q-2 -______ metal is found in a pure state in nature. Q-3 _____ is used in making fertilizers Q-4 _____ is a non-metal present in hair, eggs, and wool. Fill the Blanks
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1) iron
2) may be oxygen
3) nitrogen
4) calcium
hope it help u.
2) may be oxygen
3) nitrogen
4) calcium
hope it help u.
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