1 FACT: Protection against whooping cough from early childhood vaccines may wear off, leaving adults and adolescents at risk for infection.  FACT: In China, whooping cough is known as the âcough of 100 daysâ due to the prolonged, dry cough that is experienced by infected individuals.
Which compound contains ionic bonds 1. CaO because Ca is a metal and O is a gas and all the other possibillities are gasses combined and ionic has a metal and gas combination if you look at the periodic table of el â¦ ements the right side is gases but they are determined by like a staircase and the rest are metals.
Ionic substances are insoluble in non-polar solvents such as cyclohexane. They are soluble in water (a polar solvent) although in some cases the solubility is only small (e.g. CaCO3). When an ionic compound dissolves in water, the ions in the crystal lattice become separated and surrounded by water molecules forming hydrated ions (see p6). H2O