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September 2, 2014

September 2, 2014

Posted by **chem** on Saturday, March 6, 2010 at 5:57pm.

List the following element symbols in order of decreasing exothermic electron affinity: Al, Ca, As

_______>________>________

I wrote: Al>As>Ca (I got it wrong)

I know that if it is favorable to pick up an electron, energy will be released yet, I am still confused about what is the correct answer. Thank you!

- Intro Chemistry -
**DrBob222**, Saturday, March 6, 2010 at 6:11pmAs is the right most element in the periodic table (of the three elements); I would pick that as the highest.

Ca is the left most element in the table; I would pick that as the lowest. Al must be between. You can look up the electron affinities at www.webelements.com

- Intro Chemistry -
**chem**, Saturday, March 6, 2010 at 6:13pmThank you, I guess I got confused with Al and As :)

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