![]() All of the oxygen in the Solar System comes from exploding massive stars. Oxygen is the most abundant element in the human body (about 65% by mass), calcium helps form and maintain healthy bones and teeth, and iron is a vital part of red blood cells that carry oxygen through the body. Elements like phosphorus and copper are present in our bodies in only smallĪmounts but are essential to the functioning of all known life. The gold in jewelry likelyĬame from neutron stars collided and may have been visible as short-duration gamma-ray bursts or Was forged during supernova explosions that occurred long ago and far away. The carbon in yourīody was made by nuclear fusion in the interior of stars, as was the oxygen. The hydrogen in your body, present in every molecule of water, came from the Big Bang. This is a good thing, since otherwise the Sun would have likely burned The nuclear fusion reactions that produce the heavier elements have proceeded very slowly over the 13.7īillion year history of the Universe. Observations, indicate that the Universe was once composed of just one element, hydrogen, and that Small abundances of all the rest of the elements (about 2% of the total), as well as evidence from other The large abundance of hydrogen and helium and the (called the cosmic abundances) in parts per 10,000. The pie chart below illustrates the average abundance by mass of the various elements in the Universe Main phases: one that ended after the first 20 minutes, and the other that has been ongoing since theįormation of the first stars over 13 billion years ago. In essence, the history of the formation of the elements can be divided into two From there, the periodic table ofĮlements would emerge. ![]() Would start to be bound into atoms a few hundred thousand years later. After about 20 minutes, the ordinary matter in the Universe was a mixture of hydrogen, helium, and electrons, which The formation of the elements began about 14 billion years ago in the early minutes of the Big Bang. Yet, there is a fundamental connection between them. Stars and the awesome power of supernovas. That make up the world we live in, may seem far removed from the thermonuclear heat in the interiors of Chemistry, the study of the intricate dances and bondings of low-energy electrons to form the molecules ![]()
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