Physical Chemistry: Equations and Important Facts

Atoms, Molecules, and Quantum Mechanics   Avogadro’s number = 6.022 × 1023 Cations are smaller than the original ions; anions are larger than the original ions Five periodic trends Ionization energy, electron affinity, and electronegativity increase from left to right, bottom to top Atomic radius and metallic character increase from right to left, top to…

Antihistamines: Uses, Facts, Side Effects

Antihistamines are drugs that block the action of histamine. Histamine, also known as histamine phosphate, an amine (beta-imidazolyl-ethylamine, ergamine, or ergotidime) that is a normal constituent of almost all animal body cells. Histamine is also found in small quantities in ergot and purified meat products and is produced synthetically for medicinal purposes. In the body,…