the particles within a colloid . are as small as individual atoms are small enough to not settle out are large enough to settle out are large enough to be seen with an optical microscope

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.