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Because these radioactive elements were obtained artificially, they are man made.
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How many currently elements?
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.
Why elements symbols are not always the first letter in their name in periodic table?
Most elements have symbols from the Latin or Greek language. Often synthetic Latin or Greek words as the element was not known to them. It is usually chance that the symbols correspond to English.
What are the numbers of the synthetic elements?
Today natural elements are considered the elements up to the atomic number 98; but the elements with atomic numbers 43, 61 and 93-98 exist only in extremely traces, as a curiosity in uranium deposits.
Is it true that More than 100 elements are currently known?
Yes, it is true. There are currently 118 known elements on the periodic table.
What is NH3 elements?
NH3 is not an element, it is a compound of the two elements nitrogen and hydrogen.This compound is known as ammonia.
How many currently elements known?
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.
How many currently elements?
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.
How many are man made elements of the 118 known elements?
The 26 transuranic elements (elements with atomic numbers higher than 92) are man-made. Some lists also count technetium (element 43) as man-made as well. --------------- Now (January 2013) 97 chemical elements are considered as natural and 21 as man made.
How many known elements are there?
There are 118 elements know to man at this date. That is to say that man has created an atom which contains 118 protons, 118 neutrons, and 118 electrons. This fell apart as soon as it was created, as do most synthetic elements. There are only about 91 naturally occurring and semi-stable elements, the remaining 27 are scientifically lab founded..
What are elements with atomic numbers above 95 called?
These elements (neptunium and heavier) are called transuranic elements or trans-uranium elements. They could also properly be called artificial and radioactive.*Both plutonium and neptunium, first known through synthesis, have been found to occur naturally in trace amounts, along with americium, curium, berkelium and californium. These occur through a natural version of the synthesis process, within quantities of uranium ore.
How many elements are known to man kind?
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, 112 of which have been confirmed and are named (or in the process of being named).*If you extend the term "nature" to other planets and stars, than you will occassionally find more elements.
Why elements symbols are not always the first letter in their name in periodic table?
Most elements have symbols from the Latin or Greek language. Often synthetic Latin or Greek words as the element was not known to them. It is usually chance that the symbols correspond to English.
What are the numbers of the synthetic elements?
Today natural elements are considered the elements up to the atomic number 98; but the elements with atomic numbers 43, 61 and 93-98 exist only in extremely traces, as a curiosity in uranium deposits.
What elements are arranged on the periodic table?
All of the known 118 naturally occurring and synthetic elements are arranged on the periodic table.
Can you give me an example of a chemical element?
Here are several, in no particular order:uraniumcoppercarbonironsiliconfluorineplutoniumxenonneonphosphorussodiumamericiumcuriumcesiumiridiumeinsteiniumtechnetiumberylliumradongadoliniumpoloniumneptuniumsulfur (sulphur for the british)leadarsenicgalliummercurylanthanumactiniumlithiumbrominepromethiumtungstenmagnesiummanganesegermaniumbismuthbariumcadmiumiodinedysprosiumerbiumholmiummolybdenumnobeliumpalladiumrutheniumtantalumzincvanadiumlutetiumThere are many more that I haven't listed (90 naturally occurring on earth, 2 synthetic radioactive below uranium, several known transuranic, unknown number possible transuranic).The Periodic Table is full of them. When we compare an element to a compound, the Element is the [spacial] assemblage of pure Atoms that exist alone, while the Compound is any number of many various combinations of any of the Atoms conjoined - or bonded together - in a vast number of different ways.
What are the different elements in the Table of Elements?
The Periodic Table of the Elements has every known and certified (by the IUPAC) element in it.
How deos the number of known compounds compare with the number of known elements?
There are at least five million distinct chemical compounds known. This compares to only 91 naturally occurring elements and about thirty more synthetic elements.
