Atheism, by definition, is the lack of belief in the existence of gods or deities. It doesn't have a specific stance on the existence of souls or consciousness. Atheists can hold a variety of beliefs about these topics, as there is no one set of beliefs that all atheists adhere to, apart from their lack of belief in a god or gods.
Regarding the concept of a soul, some atheists may reject the idea of a soul because it often goes hand-in-hand with religious or supernatural beliefs. They might see the concept of a soul as lacking empirical evidence and being based on faith rather than observable evidence. However, other atheists might consider the idea of a soul or consciousness in a more philosophical or scientific manner, without attributing it to any supernatural or religious context.
Concerning consciousness, atheists generally recognize and accept consciousness as a product of the brain's complex neurobiological processes. While some might hold materialistic or physicalist views, explaining consciousness purely in terms of the physical workings of the brain, others might explore different perspectives like panpsychism or emergentism.
Ultimately, atheism does not dictate a particular stance on the soul or consciousness, leaving room for diverse beliefs and philosophies among individuals who identify as atheists.