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Sunny_sXe [5.5K]
4 years ago
14

Why do electrons enter the 4s orbital before entering the 3D orbital

Chemistry
1 answer:
garri49 [273]4 years ago
8 0

The 3d sublevel is not filled until after the 4s sublevel, because the 3d sublevel has more energy than the 4s sublevel, and less energy than the 4p sublevel. (:

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Step 3: Dissociate all soluble salts, strong acids, and strong bases (except calcium hydroxide). Leave together all "not soluble" salts and weak acids or bases:

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Step 4: Cross out "spectator ions" that appear on both sides of the reaction (these ions do not participate in the chemistry) and rewrite the "net" reaction using the smallest possible coefficients:

{2H₃O}^{ + } (aq) + NiS(s) →   { Ni}^{2 + } (aq) + H₂S(g) + 2H₂O(l)

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