What is a particle?

<img width=“750” height=“922” src=“https://i2.wp.com/flowingdata.com/wp-content/uploads/2021/01/what-is-a-particle.png?fit=750%2C922&ssl=1" class=“attachment-medium size-medium wp-post-image” alt=“” loading=“lazy” srcset=“https://i2.wp.com/flowingdata.com/wp-content/uploads/2021/01/what-is-a-particle.png?w=1280&ssl=1 1280w, https://i2.wp.com/flowingdata.com/wp-content/uploads/2021/01/what-is-a-particle.png?resize=750%2C922&ssl=1 750w, https://i2.wp.com/flowingdata.com/wp-content/uploads/2021/01/what-is-a-particle.p …