well a basic explanation is that some elements have enough electrons to be considered stable. these elements do not need to react with other elements to gain more electrons. reactive elements are no where near stable; they respond with other elements in order to become stable. the more unstable, the harsher the reaction is.
b. ke depends on motion and pe depends on position.
answer : her weight is lower on venus because the acceleration due to gravity is lower.
venus is also called as earth's twin. this is because both the mass and the size of earth and venus are almost same. the acceleration due to gravity on earth is while on venus is .
so, when shari measure her weight on venus she found her weight is lower on venus. this is because the acceleration due to gravity is lower on the surface of venus as compared to the earth.
i.e. weight depends on g.
so, correct prediction is (b)
(a) slightly repelled...