Question
State as to why:
Sodium is found to be more useful than potassium?

Answer

Blood plasma and the interstitial fluids surrounding the cells are the regions where sodium ions are primarily found. Potassium ions are located within the cell fluids. Sodium ions are involved in the transmission of nerve signals, in regulating the flow of water across the cell membranes, and in transporting sugars and amino acids into the cells. Hence, sodium is found to be more useful than potassium.

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Complete:
  1.  
  1.  
Predict the periods and blocks to which each of the following elements belong?
a. ${ }_{13} \mathrm{Al}$
b. ${ }_{24} \mathrm{Cr}$
c. ${ }_{29} \mathrm{Cu}$
d. ${ }_{11} \mathrm{Na}$
Find volume of $O _2$ at NTP obtained by heating 1 mole of $KClO _3$.
In a reaction
$\mathrm{A}+\mathrm{B}_2 \rightarrow \mathrm{AB}_2$
Identify the limiting reagent, if any, in the following reaction mixtures. $2 \mathrm{~mol} \mathrm{~A}+3 \mathrm{~mol} \mathrm{~B}$.