Why does germanium have metallic bonding? Why are ionic compounds crystalline solids? Why do boron and carbon have high melting points? The melting point of methane is low, so why is that in terms of intermolecular forces? Why does a salt compound give off light (or a colored flame) ...
In addition, 193 patients (64.5%) had positive family history of allergy. The overall frequency of sensitization to any allergen was 85.6% (256/299), whereas 14.4% (43/299) of patients did not react to any of the tested allergens. In outdoor allergens the most prevalent...