Question 1
Which of the following statements does
not describe a chemical property of oxygen?
◦ Oxygen combines with carbon to form carbon dioxide gas.
◦ When coal is burned in oxygen, the process is called combustion.
◦ Iron will rust in the presence of oxygen.
◦ The pressure is caused by collision of oxygen molecules with the sides of a container.
Question 2
Which group 5A element is most metallic?
◦ Sb
◦ Bi
◦ P
◦ N