Help me please it’s due right now review question help

M.E = mgh

given, m=400g = 400/1000=0.4kg

h=1.75m

g=9.81m/s²

M.E =0.4×9.81×1.75

=6.867J

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

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