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The first ionisation energy is the energy required to move one mole of electrons from one mole of atoms in its gaseous state.
The outer electron in Potassium is in the 4s orbital, which is further aw...

To tackle any question like this, you should first write out the reaction formula (I would do this on the whiteboard). You can see from this that the ratio between the reactant and product is 1:1. You can...

The kinetic energy of the electron will be equal to the energy what the electric field gives to it.1/2mv²=VQFrom thisv=sqrt(2VQ/m)
De Broglie wavelength:lambda=h/p=h/...