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Atomic Theory Jigsaw
Atomic Theory Jigsaw

... John Dalton was an English chemist. His ideas form the first atomic theory of matter. Dalton’s Atomic Theory states 1. All elements are composed (made up) of atoms. It is impossible to divide or destroy an atom. 2. All atoms of the same elements are alike. (One atom of oxygen is like another atom of ...
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... the US, each of its atoms would be only about 3 cm in diameter – about the size of a ping pong ball • A human hair is about 1 million carbon atoms wide • A typical human cell contains roughly 1 trillion atoms • A speck of dust might contain 3x1012 (3 trillion) atoms • It would take you around 500 ye ...
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Unbinilium

Unbinilium /uːnbaɪˈnɪliəm/, also known as eka-radium or simply element 120, is the temporary, systematic element name of a hypothetical chemical element in the periodic table with the temporary symbol Ubn and the atomic number 120. Unbinilium and Ubn are the temporary systematic IUPAC name and symbol, until a permanent name is decided upon. In the periodic table of the elements, it is expected to be an s-block element, an alkaline earth metal, and the second element in the eighth period.To date, all attempts to synthesize this element have been unsuccessful. Its position as the seventh alkaline earth metal suggests that it would have similar properties to the alkaline earth metals, beryllium, magnesium, calcium, strontium, barium, and radium; however, relativistic effects may cause some of its properties to differ from those expected from a straight application of periodic trends. For example, unbinilium is expected to be less reactive than barium and radium and be closer in behavior to strontium, and while it should show the characteristic +2 oxidation state of the alkaline earth metals, it is also predicted to show the +4 oxidation state unknown in any other alkaline earth metal.
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