Answer and Explanation:
The elements which have 1 2 or 3 valance electron in their valence cell those elements loses their electron to maintain their octet and for becoming stable and, if they loses electron positive charge will create and these ions are called cation
Example : In ionic compound Na has 1 valance electron which it is losses and form
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Answer:
The distance travel in its lifetime of earth is
Explanation:
Change respecto the pion
The speed of the pion:
Knowing the speed of the light is about
Now to determinate the distance