18. Select the false statement below:A. Fe has 2 outer electrons, 8 valence electrons, and 18 core electronsB. Fe2 is more paramagnetic (has more unpaired electrons) than Fe3 C. Fe3 is isoelectronic with Mn2 D. none of these ions (Fe2 , Fe3 , Mn2 ) have any electrons in the 4s subshellE. Cu, Ag, and Au all have electron configurations of ns1 nd10

increased stability in the completion of fluorine's outer shell.

50.23 i believe is correct but don't quote me on that.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.