I am under the impression that elements from the third period onwards can promote electrons into d orbitals to form hybridised orbitals. Why would an element in the third period promote an electron to the 3d orbital when we learn that 4s orbitals are filled first because they are lower in energy (is it to do with orbital penetration?) Why also can a 2nd period p block element not promote to 3s?
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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions
Apparently the of last four, $\ce{Mg^2+}$ is closest in radius to $\ce{Li+}$. Is this true, and if so, why would a whole larger shell ($\ce{...
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According to the values of boiling points that I found on internet the order is as follows: $\ce{H2O}$ > $\ce{HF}$ > $\ce{NH3}$ I was ...
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First mechanism is the one taught in lecture, and I wondered why the electrons from carbonyl Oxygen wouldn't react with thionyl chloride...
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