Indicate the number of unpaired electrons in
Cr, Fe , Kr...
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cr vib group 4 period 2 unpaired electron
Fe no unpaired electron it is stable because last shell completely filled
kr also a stable gas have no unpaired electron
Fe no unpaired electron it is stable because last shell completely filled
kr also a stable gas have no unpaired electron
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fe atomic number 26 k me 2 l me8 m 18 n8
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