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.
An ionic compound is one in which at least two of the elements or compounds in the group are oppositely-charged ions held together in an ionic bond. In the formation of this bond, a metal atom, either alone or bonded in a molecule, donates an ion to a nonmetallic atom. Magnesium and flourine and sodium and aluminum both will form ionic compounds. sodium and aluminum.