What could be the most common element among all people on earth?
453598
We are all human, we all have the same human nature.
397779
Most of the earth is made of iron and nickel.  This might not appear to be true at first because we see that the ground does not feel like metal, but the earth's inner and outer cores consist primarily of molten iron and nickel.  The earth's crust is only a few miles thick (at the thickest) and floats on top of the molten layers.
340026
Mercury. It gets into everything, from the soil, to the ground water, to...everywhere.
1070133
oxygen, nitrogen, every fuckin mineral and more on the periodic table...take chemistry
878474
Um, there's over a hundred elements.  I'm not going to name them all for you.  Look at a periodic table.  I'm sure there's one in your chemistry book.
63908
Solid Phase,Silicon makes up 25.7% of the earth's crust and is the second most abundant element on Earth, after oxygen. Elemental silicon is not found in nature. It occurs most often as oxides and as silicates. Sand, amethyst, agate, quartz, rock crystal, flint, jasper, and opal are some of the forms in which the oxide appears. Granite, asbestos, feldspar, clay, hornblende, and mica are a few of the many silicate minerals.\n\nhttp://periodic.lanl.gov/elements/14.html
149051
nitrogen, probably helium and hydrogen too.
777429
Nitrogen is the most abundent element in our atmosphere.  Bacteria gets N2 from the air.
746922
Most of the human body is made up of water, H2O, with cells consisting of 65-90% water by weight. Therefore, it isn't surprising that most of a human body's mass is oxygen. Carbon, the basic unit for organic molecules, comes in second. 99% of the mass of the human body is made up of just six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.\n\nOxygen (65%) \nCarbon (18%) \nHydrogen (10%) \nNitrogen (3%) \nCalcium (1.5%) \nPhosphorus (1.0%) \nPotassium (0.35%) \nSulfur (0.25%) \nSodium (0.15%) \nMagnesium (0.05%) \nCopper, Zinc, Selenium, Molybdenum, Fluorine, Chlorine, Iodine, Manganese, Cobalt, Iron (0.70%) \nLithium, Strontium, Aluminum, Silicon, Lead, Vanadium, Arsenic, Bromine (trace amounts)
664567
One should not group antimatter particles all into the word element. It is possible to make any of the elements in the form of antimatter, and for any element the antimatter equivalent would be incredibly rare here on earth. Now to say the rarest is very hard because there could be at any given point in time a number of antimatter hydrogen atoms that might seem like a large number, to the human mind, here on earth. Anti hydrogen would be the most abundant anti element, although still inconcievably rare. However, some of the heaviest non-antimatter elements that have been created in the lab probably ocasionally briefly come into existence in nature here on earth. Some of these metals might be rarer than antihydrogen, the most abundent antielement here on earth. \nNote: positrons, anti electrons, are the most abundent easily observable antiparticle, but I have left them out because they are not an element.\n\nNow, as for the universe in general: It is a real curiousity that there does not seem to be an equal amount of antimatter as matter. We humans do not now how to create matter without also creating an equal amount of antimatter. Yet, it seems as though our universe is made up almost entirely of matter... What happened to all of the antimatter during the creation of the Universe??? I don't know, and as far as I am aware of there is not a solid leading theory to explain this enigma, but many ideas have been suggested with associated mathematics. Some of them propose that the antimatter went into another dimension. Others propose that there was a very slight inequality in the quantity of matter and antimatter with the difference being the matter that is currently in existence. Still others contend that the some total of matter and antimater within the Universe are still of equal quantities, but the areas where this antimatter is hiding is too far for light to have reached us from those locations. Although I have a preference between these ideas, I will not say what it is. So, lets just say that that might be a good topic for someone interested in the subject to do some real research.
843681
Si is the most abundant mineral element, but feldspar would be the most abundant mineral as far as rocks & minerals. Quartz comes in second.
556217
It's the most important part of our earth. Just like our body.. 70% portion of water is in our body.
55744
Nickel is a common trace element in rock. Nickel ores are comparatively rare on the earth crust. Most of our planet's nickel is believed to rest in the core, which is supposed to be a nickel-iron alloy similar to comets.
396636
water, the oxygen and the abundant food. these are basic things that human being need on the earth.so all these can be found on the earth..water from rivers.oxygen from the air and food from fruit/trees, animals etc etc.
235070
from (everyone) people in everyday life.
472082
I believe all the naturally occurring elements found on earth can be found on other planets, for example samples from the surface of mars show that it is composed of basalt and granite, these are igneous rocks (come from volcanoes) that are very common on earth. Elements like iron, silicon, carbon, and  hyrogen are found in a variety of forms
518213
atoms because everything in the world is actually atoms