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Q: How many known elements are made up of the period as of 2015?
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Are there more elements or non-elements?

Non-elements. There are only around 118 known elements, there are millions of compounds made of those elements.


How many known elements are there on earth are naturally made?

92 elements occur naturally on the earth.


How many elements when mendeleeve made his periodic table?

I believe there were 55 or 56 known elements then.


Total no of elements known to man?

112 Elements ( 92 Natural and 20 Man-made ) .


Made of atoms of two or more elements?

That is known as a molecule


Why transuranic element known synthetic elements?

Because these radioactive elements were obtained artificially, they are man made.


How many man made elements are in the periodic table?

Out of the 112 elements known, 90 are found in nature and the rest (22 are man made).


Is bronze made of one element?

no it is not. you can find all the known elements on a periodic table of elements online or in a science textbook


Where on the periodic table do the most man-made elements appear?

They are in the period 7 and in the actinides family.


What group of elements in the periodic table is made up of elements that are gases at room temperature?

The elements in column 18 of a wide form periodic table or Column VIII of a narrow form periodic table, commonly called the noble gases. Also, both elements in the first period, the elements in groups 15, 16, and 17 of the second period, and the element in group 17 of the third period.


How many elements is chloroform made up of?

Chloroform is known as trichloromethane. It has a formula of CHCl4. So, the elements are Carbon, Hydrogen and Chlorine.


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.