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Start learning 50% faster. Sign in nowWhich of the following elements is a member of the actinoid series?
Who proposed the 'Law of Octaves' in the periodic classification of elements?
Which of the following metals forms an amphoteric oxide?
Which of the following is the most abundant element on earth?
Magnesium has atomic number as 12. Find out its valiancy.
Deficiency of which of the following elements is responsible for weakening of bones?
1. Calcium
2. Phosphorus
3. Nitrogen
...
The atomic bomb is based on which principle?
Ball pen functions on the principle of :
Which bond is weakest in nature?
Which of the following does not give effervescence with sodium carbonate?
