Is atheism a belief?

[Agnostico]

Hi Im new here. Im an agnostic with Christian values and Im here to try and understand some things.

Whenever I say that atheism is based on belief just like theism is I get a strong rejection from atheists. 
Some give me these twisted definitions while others claim that i cannot be agnostic without being an atheist.

So I want to start by getting the definition correct.
Am I right in saying atheists "believe there are no Gods" or "don't believe there are Gods"?
Am I right in saying atheism is based on belief? If yes then why do so many atheists reject this?
If not then Why? What is it then based on?


Do people agree with this?


Do people agree with this?
I don't because the only thing I believe in is knowledge. 
I don't lean either way on the question of God. I just don't know. 
There isn't sufficient evidence either way for me to decide.