the answer is 3
They are covalent. Some are simple molecules, others are giant covalent structures.
yes
A possible compound would be silicon dioxide with giant covalent structure and strong covalent bonds.
It depends on the type of structure; simple covalent structures (like water) generally have low boiling points, while giant covalent structures (like diamond) have high boiling points.
because there're no mobile ions
COVALENT
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They are covalent. Some are simple molecules, others are giant covalent structures.
yes
A possible compound would be silicon dioxide with giant covalent structure and strong covalent bonds.
giant molecoule structures
It depends on the type of structure; simple covalent structures (like water) generally have low boiling points, while giant covalent structures (like diamond) have high boiling points.
because there're no mobile ions
Silicon (like carbon) can form covalent bonds, it forms a giant molecule with the diamond structure. Silicon dioxide is also a giant structure with polar covalent bonds. Silica reacts with basic oxides to form silicates- and these are generally giant structures, polar covalent bonds again, that form a very large proportion of the minerals in the earths crust.
Indeed they can. A common example of Carbon covalently bonding with carbon is in what we refer to as Giant Covalent Structures, which are multiple of an atom bonded together in a set, lattice-like shape. Examples of giant covalent structures made from carbon are diamond where the atoms are arranged in a pyramid shape, and graphite, where they are arranged in flat layers.
Ionic bonded always. Also giant covalent structures- like diamond and silicon dioxide. It is NOT just ionic compounds!
Some do- for example molten silicon conducts like ametal when molten.