Oxygen, chlorine, fluorine.
No. Helium is one of the "noble" gasses, and they generally don't react with much.
All of them tend not to react with each other until you get lower down the group
They will react together. IT will form aluminium hydroxide.
Oxygen and silicon are two of the principle elements. See the related link.
Aluminium is more reactive than copper. Aluminium can react with oxygen in the air to form a protective oxide layer, while copper does not readily react with oxygen.
oxygen
Aluminium oxide has two elements: aluminium and oxygen.
Aluminium and chlorine
Aluminium is actually an element, so the only element in aluminium is aluminium.
Aluminium and chlorine.
Aluminium hydroxide
Aluminium and chlorine
An Aluminium salt and Ammonia
There are quite a few elements that do not normally react. These elements are all found in the Noble Gas family.
No. Helium is one of the "noble" gasses, and they generally don't react with much.
All of them tend not to react with each other until you get lower down the group
Aluminium and phosphorus