"Ionization energy" is the amount of energy required to remove an electron from an isolated atom. For a hydrogen atom, composed of an orbiting electron bound to a nucleus of one proton, how much ionization energy is required to force the electron from its lowest energy level entirely out of the atom?

单选题

Ionization energy is the amount of energy required to remove an electron from an isolated atom. For a hydrogen atom, composed of an orbiting electron bound to a nucleus of one proton, how much ionization energy is required to force the electron from its lowest energy level entirely out of the atom?

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Energy?is?____makes?thing?work.

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Wherever there is matter.There is energy;all changes of matter（ ）changes in the form of the energy.

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单选题

A car that only uses sun energy and not fossil energy like petrol is very environmentally friendly.

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单选题

The following unit is used to measure the quantify of energy except____.

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