Gravitational potential energy is the potential energy an object has due to its position in a gravitational field. The higher an object is the greater its gravitational potential. When it falls the gravitational potential becomes kinetic energy.
Energy stored in height differences ~APEX
dmitri mendeleev
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Helium has the highest first ionization energy and francium has the lowest first ionization energy.
Few elements have isotopes. their atomic mass is not a whole number.
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Anything that has mass.
This family is called, after IUPAC nomenclature -- actinoids.
Energy of motion is called "kinetic energy".
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