90 naturally occurring elements, unknown number possible elements.
There are a possible 189 elements, 189, 2,8,8,8,18,18,32,32,18,18,8,8,8,3.
there are 13 noble gases No8 is element136, 2,8,18,32,32,18,18,8.
Roughly, first ionization potential and electron affinity.
Total 108 elements are found in earth till 2007 dec 56 to 72 elements are in the human body, 22 to 36 are in the animal body 18 22 elements in birds are found
No Igneous rock is consistently a compound - a mixture of elements. Although there are variations in composition, igneous rock is usually made up of roughly half oxygen, roughly one quarter silicon, and lesser, but significant, quantities of aluminum, calcium, sodium, potassium, and magnesium., with a sprinkling of other elements.
One pound is roughly 0.454 kilograms. One kilogram is roughly 2.2 pounds.
3 Elements is the Answer
roughly 1/3 of the elements on the periodic table are used in some way
Roughly, first ionization potential and electron affinity.
They are metals.
Total 108 elements are found in earth till 2007 dec 56 to 72 elements are in the human body, 22 to 36 are in the animal body 18 22 elements in birds are found
The key elements to making fission bombs are: Uranium and Plutonium. The specific isotopes of interest are: Uranium-233, Uranium-235, and Plutonium-239. But many other elements are needed to make a functional bomb. As a very rough guess, about a quarter of the elements on the periodic table are needed somewhere in the bomb, roughly 23 different elements in total.
roughly about 43,739,000 people
No Igneous rock is consistently a compound - a mixture of elements. Although there are variations in composition, igneous rock is usually made up of roughly half oxygen, roughly one quarter silicon, and lesser, but significant, quantities of aluminum, calcium, sodium, potassium, and magnesium., with a sprinkling of other elements.
2
118 elements
USA - roughly 60% UK - roughly 70% Bangladesh - roughly 0%
One pound is roughly 0.454 kilograms. One kilogram is roughly 2.2 pounds.
Roughly 94000 worldwide