Roughly, first ionization potential and electron affinity.
90 naturally occurring elements, unknown number possible elements.
elements are those which has same kind of atoms ex. oxygen, hydrogen etc. but when you join two elements you get a compound. ex. react oxygen and hydrogen you get water. elements are atoms of the same kind. so if you cut up a piece of sugar paper of different colours and 5 of you did this and 3 where squares and 2 where circles and you joined 2 circles together of the same size (roughly) and nearly same colour then they are an elements. but if they where different colour or sizes then they would just be a compound.
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.
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
1 in every 250, roughly.
roughly 1/3 of the elements on the periodic table are used in some way
Roughly, first ionization potential and electron affinity.
Roughly 30% of all US jobs have their origin in agriculture or a related field. This includes the large agribusiness processing firms.
They are metals.
In Hebrew, it roughly means, "PRINCESS"
roughly 350...
90 naturally occurring elements, unknown number possible elements.
roughly 200
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.
The air we breathe is roughly one fifth oxygen and four fifths nitrogen.There are very small percentages of other gases such as Carbon Dioxide, Neon, Helium, Methane, Krypton, Hydrogen and Xenon.
Roughly around 400g but different sizes mean different weights.