\"moving down group 2a (alkaline earth metals), which element has the largest first ionization energy? \" is the answer to this: radium? . also, could you explain what a \"first\" ionization energy is? .

Ionization energy is the energy required to remove the outermost electron from one mole of gaseous atom to produce 1 mole of gaseous in to produce a charge of 1. The greater the ionization energy, the greater is the chance f the electron to be removed from the nucleus. In this casse, Radium has the largest ionization energy.

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.

elements make up everything, and they combine to make compounds.

the answer is c