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Bismuth has recently been found to have a no stable isotope and has a half-life of 4.6 x 10^19 years. Also, the simple hydrogen atom (a single proton), is theorized to decay at a rate of 6.6 x 10^33 years. So far all tests to observe a proton decay have failed.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoWhen talking about half-life, you should not ask about "elements" but about "isotopes". There is a great difference, for example, between hydrogen-2 (which is stable), and hydrogen-3 (which has a half-life of about 19 years). Same element, different isotopes.
The Wikipedia article, "List_of_isotopes_by_half-life", lists 6 isotopes with a half-life of less than a second; the shortest is Beryllium-8, with a half-life of 70 x 10-18 seconds (70 millionth of a millionth of a millionth second).
Wiki User
∙ 15y agoAny radioactive element has a half-life. Some examples are Polonium, Radon and Plutonium.
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Do lithium has the lowest electronegativity?
No. the element francium will have the lowest electronegativity. However it is radioactive and for practical purpose, cesium is considered to be the element with lowest electronegativity.
What element has the lowest electrogravity?
francium
Which metal has the lowest atomic number?
Hydrogen is a non metal element. Atomic number of it is 1. It is the element with lowest atomic number.
Which element has the lowest mass on the periodic table?
The atom that has the lowest mass is hydrogen. So assuming the same numbers of atoms in each element, hydrogen would be the element with the lowest mass.
What element has the lowest dencity of all the elements?
hydrogen
Which element has the lowest number of electrons?
Hydrogen, the element with the lowest atomic number.
Do lithium has the lowest electronegativity?
No. the element francium will have the lowest electronegativity. However it is radioactive and for practical purpose, cesium is considered to be the element with lowest electronegativity.
What element is the lowest density of all element?
hydrogen
When was Illadelph Halflife created?
Illadelph Halflife was created on 1996-09-24.
What is ionization energy and which element has the lowest ionization energy?
The energy required for an element to ionize and helium has the lowest.
What element has the lowest electrogravity?
francium
What element has the lowest electronegative?
Barium
Which is the next stable element after uranium?
none, uranium itself is unstable, there are no stable elements after bismuth; and even some researchers suggest that bismuth is an unstable radioactive element with a halflife approaching twice the age of the universe.
Which metal has the lowest atomic number?
Hydrogen is a non metal element. Atomic number of it is 1. It is the element with lowest atomic number.
Which solid element has the lowest density?
The solid element that has the lowest density is lithium. Its density is 0.534 grams per cubic centimeters. Lithium is a metal, and it does not occur freely in nature.
Which element has the lowest mass on the periodic table?
The atom that has the lowest mass is hydrogen. So assuming the same numbers of atoms in each element, hydrogen would be the element with the lowest mass.
Which element as the lowest atomic mass?
Hydrogen
