Element #43 - technetium
Element #61 - promethium
Element #95 - americium
Element #96 - curium
Anything beyond curium
Elements #93, neptunium, and #94 plutonium, are only found naturally in very tiny amounts in uranium ore, such as might be produced by unusual nuclear reactions.
Also, some traces of plutonium-244 might be left over from before the creation of the Earth.
The least common element that is lighter than uranium but is found naturally (from radioactive decay) is astatine, element #85. It is extremely radioactive.
Astatine is much rarer than polonium (84), radon (86), francium (87), radium (88),
actinium (89), or protactinium (91).
Only in nuclear physics and nuclear chemistry laboratories; copernicium is an artificial chemical element.
Bohrium is a synthetic element that doesn't exist in nature and has only been produced in small amounts in laboratories. As such, its appearance is not well-defined. However, it is a silvery metal that likely has similar characteristics to other elements in its group on the periodic table.
There are 92 elements that exist in nature*. Every heavier element has decayed before our time. Of course, there are more elements in the periodic table, but they are all synthetic elements-they were made in a laboratory. Theoretically, there is no limit on how heavy an element could become-you can always add a proton to the nucleus. However these synthetic elements exist only for a fraction of a second and only in particle accelerators. There are currently 115 known elements.
Because it is intended to represent all known elements, not only those which exist in nature.
All the existing elements are natural the man made elements are rare and have a very short life.
Lawrencium exist only in specialized laboratories.
There are more than 1000 known chemical elements, including the periodic table elements, isotopes, and synthetic elements created in labs. In terms of the diversity of elements in the universe, there are countless variations arising from different combinations and arrangements of these elements.
Nobelium exist occasionally and only in rare nuclear physics laboratories.
Einsteinium is not a common element; Es exist only in specialized laboratories and only in amounts of milligrams.
Nobelium exist occasionally and only in rare nuclear physics laboratories.
Nobelium exist occasionally and only in rare nuclear physics laboratories.
Meitnerium hasn't uses and exist only in some specialized laboratories.
Lawrencium is an artificial element and can exist only in some rare specialized laboratories.
If you think to chemical elements the number of elemens known today is the same around the world; of course, some artificial elements or other very rare elements don't exist in Philippines laboratories, ores or plants.
Fermium exist only in specialized and very rare laboratories.
There are wide variety of laboratories that exist throughout the world. These include science laboratories, medical laboratories, and chemistry laboratories.
Elements can either be synthetic or natural. Synthetic elements are made artificially in laboratories, while natural elements exist in their natural state in nature. Natural elements can further be defined as native elements. These elements exist in their uncombined state.