hey i have a question what are the two requirements of mater and can matter exist at 0 kelvin

yes, matter exists at 0 K, it's just really cold.

The two requirements for matter are having mass and occupying space. In other words, matter is anything that takes up physical space and has weight.

Regarding your second question, matter can indeed exist at 0 Kelvin (absolute zero), but the behavior and properties of matter change significantly as the temperature approaches absolute zero. At this extremely low temperature, atoms and molecules stop moving and lose their energy. Matter at 0 Kelvin is said to be in its lowest possible energy state.

However, it's important to note that achieving an exact temperature of 0 Kelvin is theoretically impossible, as it represents the absolute absence of any thermal energy. Nonetheless, scientists have been able to get very close to absolute zero, which allows for the observation and study of matter at ultra-low temperatures.