# Lumps

Some chemicals such as salt, ice and lead are available in lump form. These lumps can be handled directly and behave like other parts - they can be moved, rotated and have their own Reaction details and Atom viewer windows. Lumps can also be involved in reactions outside of vessels.

Lumps have been designed to behave as realistically as possible during reactions:

- They can be reduced in size unevenly, for example, by melting.
- They can be partially dissolved, for example, when partially dipped in a solution.
- They can be coated or partially coated.
- They can explode (though no fragmentation occurs).
- They can burn, with flames appearing on the outside of the lump.
- They can float, bob or sink in a solution. Collisions between lumps in a solution are not modelled.

## See also:

- Reaction details
- Atom viewer
- Using chemistry parts