s
Sodium does occur naturally in the earth. However it is a very reactive metal and only occurs as compounds of sodium (e.g. sea salt NaCl).
If you mean, does it occur naturally, then the answer is no.
No, because it is quite reactive.
Ammonia does occur naturally, but it is manufactured on an industrial scale.
Thallium, discovered in 1861, does occur naturally, but not in its pure form.
It is manufactured.
Sodium does occur naturally in the earth. However it is a very reactive metal and only occurs as compounds of sodium (e.g. sea salt NaCl).
If you mean, does it occur naturally, then the answer is no.
No, because it is quite reactive.
manmade, manufactured, artificail
Ammonia does occur naturally, but it is manufactured on an industrial scale.
Calcium fluoride does not actually occur naturally in the human body and as such doesn't really contain a function. Outside of the body it is used in the production of materials.
Chlorine gas does not occur naturally as it is too reactive. Chloride salts occur naturally. The most common is sodium chloride, NaCl. Chlorine, Cl2, is obtained by electrolysing molten NaCl.
The isotopes are not manufactured for specific uses, they occur in nature naturally.
All existing products which do not occur naturally are manufactured. This includes items as diverse as computers, phones, toys, clothing, cars, musical instruments, and everything else which does not occur in nature.
Sodium is an extremely reactive element, meaning that it is unstable in its elemental form and stable in compounds. It will react spontaneously with oxygen, water, carbon dioxide, and even nitrogen. As a result, it does not naturally occur in elemental form.
It DOES occur naturally. It is an ore. It is not man made.