What is the net electrical charge on a magnesium ion that is formed when a neutral magnesium atom loses two electrons?

As we know that fundamental charge due to an electron is given by

so here we will say that charge on an atom due to loss of electron is termed as positive charge while due to gain of electron it is negative charge

Here when magnesium loses two electrons it will become positively charged

And total charge on it is given as

now we know that

N = 2 electrons

so charge on it is given as

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.