Na2S (sodium sulfide) is made up of a metal (Na) and a non metal (S), so this would constitute an ionic bond.
Ionic bond
The water molecule has a polar covalent bond.
Copper isn't a chemical bond, its an element
Its a covalent bond
Covalent bond
Sodium sulfide has an ionic bond.
Ionic bond
No chemical bond, but a metallic bond.
The water molecule has a polar covalent bond.
Ionic. One metal 'gives' its electrons to the other. That's why we have valencies, to show this.
A chemical bond
Chemical bond
Copper isn't a chemical bond, its an element
The chemical bond of carbohydrates is called glycosidic bond.
Of course
Its a covalent bond
Electrons are shared in a type of bond known as covalent. This type of bond is also considered a chemical bond.