What do you mean by valency?Can you explain the valence shell of calcium?
Valency is also called as the combining capacity of an element with other elements to form bonds. It is also ther number of vacant electrons left in the outer shell. They all have an outer shell with two electrons and are very reactive. Those elements in the second column have two electrons ready to make compounds. It shouldn't surprise you that calcium has a valence of 2.
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Answer laterA shell of mass m moving horizontally explodes into two equal pieces at the instant its momentum is 3p.one of the fragments attains a linear momentum of 4p upward direction.find the kinetic energy gained by the system immediately after explosion?
Hello,
Given that the shell is moving horizontally and explodes in two equal pieces. One particle is moving upward with a momentum 4p and the momentum at time of explosion is 3p.
Kinetic Energy = ?
By using law of conservation of momentum,
Total Momentum of particle before explosion = Total Momentum of particle after explosion
So, 3P ( i )= 4P ( j ) + P2
So, Magnitude of P2 = 5P
So, gain in Kinetic Energy
= ( 16 P^2 / m ) + ( 25 P^2 / m ) - ( 9 P^2 / 2m )
= 73 P^2 / 2m
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