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The element present in the largest amount in rocks and minerals is _____?
An alloy used in making heating elements for electric heating devices is _____?
German silver is an alloy of _______?
Radioactivity was discovered by _________?
The father of modern chemistry is ______?
Diamond is _____?
The M.K.S system was first introduced by ______?
Which one is not metal?
Which of the following is the lightest metal?
Which one among the following substances evolved heat when dissolved in water?
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