[Answer] Elements with _______________ first ionization energies and ___________ electron affinities generally form anions.

Answer: high very negative
Elements with _______________ first ionization energies and ___________ electron affinities generally form anions.
Elements Electron affinity can be defined in two equivalent ways. First as the energy that is released by adding an electron to an isolated gaseous atom. The second (reverse) definition is that electron affinity is the energy required to remove an electron from a singly charged gaseous negative ion.
The electron affinity (E ea) of an atom or molecule is defined as the amount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form a negative ion.. X(g) + e − → X − (g) + energy . Note that this is not the same as the enthalpy change of electron capture ionization which is defined as negative when energy is released.
Robert S. Mulliken proposed that the arithmetic mean of the first ionization energy (E i) and the electron affinity (E ea) should be a measure of the tendency of an atom to attract electrons. As this definition is not dependent on an arbitrary relative scale it has also been termed absolute electronegativity with the units of kilojoules per mole or electronvolts.
Sat Jul 12 2003 14:30:00 GMT-0400 (Eastern Daylight Time) · Thus sodium will in most cases form a compound in which it has lost a single electron and have a full outer shell of eight electrons or octet. The energy required to transfer an electron from a sodium atom to a chlorine atom (the difference of the 1st ionization energy of sodium and the electron affinity of chlorine) is small: +495.8 − 349 …
Tue Jun 25 2002 14:30:00 GMT-0400 (Eastern Daylight Time) · Ionization energy is also a periodic trend within the periodic table. Moving left to right within a period or upward within a group the first ionization energy generally increases with exceptions such as aluminium and su…

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