There are 15 protons and 22 neutrons in the nucleus of an element. What is its mass number?
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In a water molecule, the ratio of mass of Hydrogen to the mass of Oxygen is always:
In the following gases, which is not a colorless or odourless gas?
15% of an alloy was silver. If in a quantity of alloy there was 51 g of silver, what was the quantity of the other elements in the alloy?
Which of the following is a CORRECT statement?
Researchers at the University of Illinois have discovered new form of matter called Excitonium which was coined by ______ in the 1960’
What is the action of dry HCl gas on dry litmus paper?
Pick the odd one out from the following:
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