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.
Two nonmetals = covalent   metal + nonmetal= ionic   Therefore sodium oxide is formed by ionic bonds, as sodium is a metal and oxygen is a non-metallic element.9 people found this useful.itrogen oxide is a covalant compound because it is made up of two non-metals nitrogen and oxygen and it forms the bond by sharing electrons. 1 person found this useful.