They are made of compounds not elements unless they are Iron or Aluminum window frames. Most window frames were made of wood but UPVC is becoming more popular.
Wood, treated and plastic (PVC) coated wood, aluminium and aluminium alloys, polyvinylchloride.
Lead '''is''' an element, and no other element is made up of it, although many compounds contain lead.
Harilium is a made up part to a periodic table some one had made up
Oxygen is an element.
Iron is made up of one type of particle which is why it is an element, whereas water is made up of two different particles so it is not an element.
An Element
atom
Depends on what type of element it is
This element is carbon.
Yes, there are frames that have a built in light and even frames that have a moving picture that lights up.
Car tyres are made of up more than one element, at least carbon and hydrogen.
An element is made by atoms. smallest part of element is atom.