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.
SOLUTION. 1  Sodium is a metal, and oxygen is a nonmetal; therefore, Na 2 O is expected to be ionic. 2  Both phosphorus and chlorine are nonmetals. 3  The NH 4 in the formula represents the ammonium ion, NH 4, which indicates that this compound is ionic. 4  Both oxygen and fluorine are nonmetals.hen an ionic compound is formed from magnesium and oxygen, the magnesium ion has a 2+ charge, and the oxygen atom has a 2â charge. Although both of these ions have higher charges than the ions in lithium bromide, they still balance each other in a one-to-one ratio.