the gray banded king snake or corn snake
The Speckled King snake is a black snake with yellow or orange spots speckled over it's body. Another black snake with yellow spots would be Baby Eastern Black King Snake. Both are completely black with yellow speckles.
Black mamba
Although there are several snakes that fit this VERY general description, the most common are either a garter snake or a ribbon snake. Neither are poisonous and won't hurt you.
If you mix orange and black, you would get a darker shade of orange. The black pigment would darken the orange color, creating a more muted or earthy tone.
black mamba because the black mamba can use a toxic venom injected to the garter snake
The Arizona black rattlesnake is black and has a rattle.
'Black Snake' actually refers to a number of snakes, the whole of Genus Pseudechis is often referred to as 'black snake', and of the 5 or so types of snakes commonly called Black Snake these are the only ones in the familiy Elapidae (same Familiy as the Black Mamba), the Black Mamba is of Genus Dendroaspis. (Simple answer would be 'No'.)
i think its a black and green snake.......
Black Mamba
There would be no impact on other snakes - due to the Black Rat snake being a rodent eater. Other snake species would co-exist so long as there was enough natural prey to support all snake species in the area.
BLACK
Could be any one of a number of species. One example would be an African House snake.