The answer is:
To separate an insoluble solid from a soluble solid:
Mixing the mixture with water, filtering out the insoluble solid, and then evaporating the water to isolate the soluble solid.
That is when we mix the mixture with water , soluble solid got dissolved into it but insoluble solid won't, so it can be separated using filtering process so that it got collected into filter paper and rest soluble solid can be separated from water by evaporation as water evaporates leaving the soluble solid behind.
If you are studying an element on the periodic table, look at which period/row it is in. With the S and P blocks of the periodic table, the period it's in is the same number as the valence energy level. but, if it is located in the D block, the valence energy level number is always one less than the period number the element is found in.
We are not able to know that the galaxy have oval or sperical shape because we have not such modern technology to look over it
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