The principal quantum number of the electrons that are lost when iron forms a ca

Question

The principal quantum number of the electrons that are lost when iron forms a cation is ________.

The most electronegative atom of the ones listed below is ________. A) B B) Al C) Ga D) In E) Ti

The type of compound that is most likely to contain a covalent bond is ________. a) one that is composed of a metal from the far left of the periodic table and a nonmetal from the far right of the periodic table b) a solid metal c) one that is composed of only nonmetals d) held together by the electrostatic forces between oppositely charged ions e) There is no general rule to predict covalency in bond

Explanation / Answer

When iron forma cation Fe+2, the electronic configuration is

1s2 2s2 2p6 3s2 3p6 4s2 3d4, so the principle quantum number is 3d.

When it is Fe+3, 1s2 2s2 2p6 3s2 3p6 4s2 3d3. So the principle quantum number is also 3d.

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