Here are some common anions, which are negatively charged particles, that we come across in our daily lives:

1. Chloride Ion (Cl$^-$)

   • This is found in table salt (NaCl).
   • It helps keep our body's fluids balanced.
   • You can find it in seawater at about 19,000 mg per liter.

2. Sulfate Ion (SO$_4^{2-}$)

   • You can find this in Epsom salt (MgSO$_4$).
   • It is often used in fertilizers and cleaning products.

3. Nitrate Ion (NO$_3^-$)

   • This is an important nutrient in fertilizers.
   • In groundwater, its amount can go up to 10 mg per liter, which is the limit for drinking water.

4. Carbonate Ion (CO$_3^{2-}$)

   • This is found in baking soda (NaHCO$_3$).
   • It is important for the carbon cycle in nature.

These anions play key roles in many biological and chemical processes. Understanding them helps us see how they affect our everyday life!