Which of the following correctly represent the electronic distribution in the
Mg atom?
(a) 3, 8, 1
(b) 2, 8, 2
(c) 1, 8, 3
(d) 8, 2, 2
A silver ornament of mass ‘m’ gram is polished with gold equivalent to 1%
of the mass of silver. Compute the ratio of the number of atoms of gold and
silver in the ornament.
A gold sample contains 90% of gold and the rest copper. How many atoms
of gold are present in one gram of this sample of gold?
Raunak took 5 moles of carbon atoms in a container and Krish also took 5
moles of sodium atoms in another container of same weight. (a) Whose
container is heavier? (b) Whose container has more number of atoms?
The difference in the mass of 100 moles each of sodium atoms and sodium
ions is 5.48002 g. Compute the mass of an electron.
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
Does the solubility of a substance change with temperature? Explain with the help of an example.
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