The Virus Envelope is where the capsid is surrounded by lipid bilayer that contains viral proteins, usually including the proteins that would enable the virus to bind to the host cells. and is derived from the host cell membranes. They may help viruses avoid the host immune system. The viral envelope then fuses with the host's membrane, allowing the capsid and viral genome to enter and infect the host.
the particles of solid silver at room temperature are closer together and are colliding with each other more often therefore making it a solid. the particles of liquid water at room temperature are further apart and don't collide as often and have more room to move.
