What is the half-life of beryllium-8?
What is the half-life of beryllium-8?
10−17 seconds
The predicted beryllium-8 half-life is calculated as 8.19 �� 10−17 seconds which is in exact agreement with the measured value of 8.19��10−17 seconds (±0.37��10−17). This strongly suggests that beryllium-8 is a traditional alpha-decay rather than the fission of beryllium-8 into two helium atoms.
How many electrons does beryllium 9 have?
The mass of an atom is contributed by masses of protons and neutrons, electrons are considered comparatively massless. Here, the atomic number is 4, thus beryllium contains 4 electrons and 4 protons. Since, the atomic mass is 9, the number of neutrons is equal to 5 (= 9 – 4).
What is the charge of beryllium 9?
+4
The charge of a beryllium-9 nucleus is +4. The number of protons in the nucleus of an atom determines its charge.
Is beryllium stable?
Beryllium is the only stable light metal with a relatively high melting point.
How many electrons does beryllium-9 have?
Why does beryllium 9 have 5 neutrons?
Beryllium has an atomic number of 4 and an atomic mass of 9. Here, the atomic number is 4, thus beryllium contains 4 electrons and 4 protons. Since, the atomic mass is 9, the number of neutrons is equal to 5 (= 9 – 4). Hope this helps.
How many protons and neutrons are in beryllium?
Name Beryllium Number of Protons 4 Number of Neutrons 5 Number of Electrons 4 Melting Point 278.0° C
Which is an unbound resonance of beryllium-8?
Beryllium-8 ( 8Be) is an unstable radionuclide with 4 neutrons and 4 protons. It is an unbound resonance and nominally an isotope of beryllium.
Why is beryllium-8 important to the universe?
If we could somehow change the universe to be just a bit more like we could expect, and where Beryllium-8 was a stable isotope, the universe might look quite a bit different. Even smaller stars could produce a good amount of Beryllium-8 and thus heavier elements, and the interstellar medium would be that much richer.
Why is there only one stable isotope of beryllium?
Beryllium is prevented from having a stable isotope with 4 protons and 6 neutrons by the very large mismatch in proton/neutron ratio for such a light element. Nevertheless, this isotope, 10 , has a half-life of 1.39 million years, which indicates unusual stability for a light isotope with such a large neutron/proton imbalance.