Ch4 Worksheet

Ch4 Worksheet - CH101/Ison Ch 4 Worksheet Name: _, _ Last,...

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CH101/Ison Ch 4 Worksheet Name: _________, _________ Last, first I. Electron configurations of ions: - Cations of s-block metals lose their highest energy s-electrons. - Cations of d-block metals first lose their highest energy s-electrons, then d- electrons. Fe [Ar] 4s 2 3d 6 , Fe 2+ [Ar]3d 6 , Fe 3+ [Ar]3d 5 . - Anions of p-block non-metals add electrons to their highest energy p-orbitals until they are filled. Practice: Write the electron configurations of the following ions; S 2- ______________ V 3+ _______________ Ni 2+ _____________ Mo 5+ ______________ Pb 2+ ____________ Cl 1- _______________ Mn 4+ ____________ Ag 1+ ______________ What do you notice about the highest energy level of the anions? II. Most common oxidation states: -The oxidation state of an elemental substance (Cl 2 , N 2 , O 2 ) is always zero. -Group 1A, 2A, 3A always have ox. states equal to the group #. (+1, +2, +3 respectively) -Oxygen is usually -2 except when a peroxide (H 2 O 2 ) in which case ox. state is -1. -Hydrogen is usually +1, except when a hydride (NaH) in which case ox. state is -1. -Halogens are
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Ch4 Worksheet - CH101/Ison Ch 4 Worksheet Name: _, _ Last,...

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