There isn't a simple answer to "what are the 3 solids in the atmosphere". The atmosphere primarily consists of gases, with only a small amount of solid particles.

Here's a more comprehensive breakdown:

* Gases: The atmosphere is primarily made up of nitrogen (78%), oxygen (21%), and argon (1%), along with trace amounts of other gases like carbon dioxide and neon.

* Solids: The solids present in the atmosphere are called aerosols. These are tiny particles of dust, smoke, sea salt, pollen, volcanic ash, and even microorganisms suspended in the air.

* Liquids: Water vapor, which is gaseous water, also exists in the atmosphere. When it condenses, it forms clouds and precipitation (rain, snow, hail, etc.).

It's important to remember that the amount and types of aerosols vary significantly depending on location, time of year, and human activity.