Dioxide is two oxygen atoms.
Silicon dioxide (SiO2) is the element oxide that makes up quartz and opal. Silicon dioxide is a compound composed of silicon and oxygen atoms and is the main component of these minerals.
Nitrogen makes up 75% of the air followed by carbon dioxide and oxygen
2 atoms of oxygen combined with 1 atom of carbon make up carbon dioxide, which makes it a compound.
The element that makes up most of the earths CORE is iron.
The element that makes up the majority of the human body is oxygen.
Silicon Dioxide
Oxygen makes up roughly 20% of the atmosphere. Carbon Dioxide makes up 0.035% of the atmosphere.
Its non-metal
Hydrogen is an element, there will be atom that makes up an element and not element that will turn into another.
carbon dioxide and monoxide are compounds. they are not elements.
It makes up 0.039% of the air.