Which snakes are a part of the cobra family?

Their many snakes that belong to the cobra family but if you asking which snakes are true cobras (genus naja) there are 21 of them
Andamen cobra
Anchietas cobra
Black necked spitting cobra
Black and white cobra
Chinese cobra
Cape cobra
Central asia cobra
Egyptian Cobra
Golden spitting cobra
Indonesian cobra
Indo-chinese cobra
Indian cobra
Mandalay spitting cobra
Mali cobra
Monocles cobra
Mozanbique cobra
Nubian cobra
Phillipine cobra
Peters cobra
Red spitting cobra

Some have hemotoxic venom,but most posses neurotoxic venom

King Cobras

Hope this helps:
The King Cobra is ophiophagous; it feeds almost entirely on other snakes, even venomous ones, although it sometimes preys on small rodents and birds. It will only attack humans if provoked or in other extreme circumstances that threaten its survival. King Cobras may reach up to 5.2m (17.1ft) in length, making them the largest venomous snakes in the world. They kill their prey by injecting a neurotoxin through their hollow fangs. The neurotoxin blocks the synaptic communication between the victim's neurons and muscles, thus stopping movement and muscle control.

In addition to a deadly bite, the Spitting Cobra can incapacitate larger would-be predators by delivering venom to their eyes.

The Black Cobra, found in Pakistan and North India, is generally considered to be a sub-species of the Indian Cobra or Spectacled Cobra (Naja naja).

Cobras are part of the Elapidae family. The common feature of this group of snakes is they have short fixed fangs, which do not fold back against the roof of the mouth as do viper's fangs. They have a neurotoxin which attacks the nervous system. Other snakes that are part of this family are:
Mambas, Kraits, Coral snakes, Sea snakes, Tiger snakes and the Common Brown,(both from Australia). All deadly poisonous

cobras?