Question

Hi, the concept of variable valency is confusing my understanding of valency, how is it possible that the loss of electrons from the penultimate shell will make the electronic configuration unstable yet it will be balanced? Pls explain...​

Answer 1

Explanation:

GIVEN :-

Two force P and Q .

Maximum resultant = 300.

Minimum resultant = 800 N.

TO FIND :-

The value of P and Q.

SOLUTION :-

The maximum resultant force can be written as,

\begin{gathered} \implies \sf \: P + Q = 300....(1) \\ \end{gathered}

⟹P+Q=300....(1)

The minimum resultant force can be written as,

\begin{gathered}\implies \sf \: P - Q = 800....(2) \\ \end{gathered}

⟹P−Q=800....(2)

From equation 1 we have,

\begin{gathered}\implies \sf \: P = 300 - Q ....(3) \\ \end{gathered}

⟹P=300−Q....(3)

From equation 2 we have,

\begin{gathered}\implies \sf \: P = 800 + Q ....(4) \\ \end{gathered}

⟹P=800+Q....(4)

On comparing equation 3 and 4 we get,

\begin{gathered}\implies \sf \: 300 - Q = 800 + Q \\ \end{gathered}

⟹300−Q=800+Q

\begin{gathered}\implies \sf \: - 2Q = 500 \\ \end{gathered}

⟹−2Q=500

\begin{gathered}\implies \sf \: - Q = \dfrac{500}{2} \\ \end{gathered}

⟹−Q=

2

500

\begin{gathered}\implies \sf \: Q = - 250 \\ \end{gathered}

⟹Q=−250

Now substitute the value of Q in equation 1,

\begin{gathered}\implies \sf \: P - 250 = 300 \\ \end{gathered}

⟹P−250=300

\begin{gathered}\implies \sf \: P= 300 + 250 \\ \end{gathered}

⟹P=300+250

\implies \sf \: P=550⟹P=550

Hence the value of P is 550 and value of Q is -250.