Sodium and potassium are placed in the same group of modern periodic
table. If the molecular formula of sodium sulphate is Na2SO4, then decide
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The molecular formula of potassium sulphate is K2SO4.
- The elements with similar chemical properties are placed in the same group of the modern periodic table
- Thus the valency of both sodium and potassium is the same, i.e., +1.
- So, they will react to form similar sulphates.
- Hence, we just replace Na with K in the formula of sodium sulphate to get K2SO4 as the formula of potassium sulphate.
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Answer:
bcoz they have same number of valency electrons in their outermost shell.
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