
NEW YORK: They exist for only seconds at most in real life, but they’ve gained immortality in chemistry: Two new elements have been added to the periodic table.
The elements were recognized by an international committee of chemists and physicists. They’re called elements 114 and 116 for now _ permanent names and symbols will be chosen later.
You’re not likely to run into any of this stuff. Scientists make them in labs by smashing atoms of other elements together to create the new ones.
‘‘Our experiments last for many weeks, and typically, we make an atom every week or so,’’ said chemist Ken Moody of the Lawrence Livermore National Laboratory, who’s part of the discovery team.
In contrast to more familiar elements like carbon, gold and tin, the new ones are short-lived. Atoms of 114 disintegrate within a few seconds, while 116 disappears in just a fraction of a second, Moody said.
Both elements were discovered by a collaboration of scientists from Livermore and Russia. They made them by smashing calcium ions into atoms of plutonium or another element, curium. The official recognition, announced last week, cites experiments done in 2004 and 2006.
In the periodic table, the number of an element refers to the number of protons in the nucleus of an individual atom. Leading the list is hydrogen (H) with one. Sodium (Na) has 11, Iron (Fe) has 26, and silver (Ag) has 47.

































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