most elements have partly filled orbitals (or shells) and they try to gain, lose or share electrons so as to satisfy octet rule.
Hence they are reactive and not generally found in free state
Fluorine is an element that is never found in its free state in nature due to its high reactivity, forming compounds with other elements very quickly.
Sodium, being a reactive element In group 1, cannot be found as element in nature. One of its common compounds is rock salt.
Sodium (Na) is a highly reactive element so it cannot be found in free state but we can have it in compound form like NaCl.
The most stable of any element is found free in nature. Sometimes isotopes are also found along with the most stable of an element. Isotopes usually have short half life.
Platinum usually exists uncombined in nature or alloyed with iridium.
iron,silver,and gold
Phosphorus is not found in its free state in nature but is mostly contained in phosphate minerals, which are the main sources of phosphorus used for fertilizers. Additionally, phosphorus can also be found in biological organisms like plants and animals.
Gold is found ONLY in free state, since it is noble, does not tend to link. Moreover, its compounds, if were present in nature, would decompose under heat, light - to free gold
Hydrogen is highly reactive and tends to react with other elements to form compounds. This prevents hydrogen from existing in its elemental, free state in nature. Additionally, hydrogen is the most abundant element in the universe, but its light weight allows it to easily escape Earth's atmosphere.
Manganese is an element. It is not found as a free element in nature; it is often found in combination with iron, and in many minerals. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels.
potassium is a natural element and found inn several minerals in earth . but it can not exist free in nature.
Only a few metals are found in the free state, generally metals react to form for example oxides, sulfides which then may further react. Some found free are gold silver copper and platinum. All of these are relatively unreactive