Answers

2016-05-05T20:15:31+05:30

Removing one electron from a lithium atom produces:

Li (1s22s1) ⇒ Li+ (1s2)

Removing two electrons from an iron atom produces:

Fe ([Ar]3d64s2) ⇒ Fe+2 ([Ar]3d6)

Removing a third electron from iron produces:

Fe+2 ([Ar]3d6) ⇒ Fe+3 ([Ar]3d5)

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2016-05-05T20:22:11+05:30
Sodium---1s2 2s2 2p6 3s1
calcuim--- 1s2 2s2 2p6 3s2 3p6 4s2
neon--- 1s2 2s2 2p6
oxygen--- 1s2 2s2 2p4
fluorine--- 1s2 2s2 2p5
nitrogen--- 1s2 2s2 2p3
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