Beryllium 9 and Beryllium 10, however, beryllium 10 is not a fully stable element, and will decay in the course of something like 1 billion years, so is often considered stable nonetheless.
Sodium-23 and Sodium-22 are two common isotopes of sodium. Na-23 is the only stable isotope of Sodium. Na-22 is one of the two isomers (the other of which is Na-24). -V
Lithium has two stable isotopes, lithium-6 and lithium-7. There are also several radioactive isotopes of lithium, with lithium-8 being the most common radioactive isotope.
You question is a bit incorrect. Beryllium is a metallic element in Group (II) of the Periodic Table. Being in Group (II) it will have a strong tendency to loose electrons(ionisation). In its neutral state beryllium has the electron structure of 1s2, 2s2, This means that its inner most electron shell (1s) contains two electrons. Its outer most electron shell (2s) also contains two electrons. When beryllium ionises two electrons , they are 'lost' from the outer most (2s) electron shell. They are further from the nucleus of the atom and are not so strongly held.!!!!! When these two electrons have 'gone' , the Beryllium atom is now the Beryllium ION. (It is no longer an atom). Formulaically it is written as Be(g) = Be^(2+) + 2 e^(-) So for beryllium atom to become a Beryllium ION it LOSES TWO electrons.
Beryllium has one outer electron shell with two electrons.
Most elements contain a mixture of isotopes, which are atoms of the same element with different numbers of neutrons. Isotopes can have different properties but behave similarly in chemical reactions due to their identical number of protons.
Sodium-23 and Sodium-22 are two common isotopes of sodium. Na-23 is the only stable isotope of Sodium. Na-22 is one of the two isomers (the other of which is Na-24). -V
Lithium has two stable isotopes, lithium-6 and lithium-7. There are also several radioactive isotopes of lithium, with lithium-8 being the most common radioactive isotope.
The valence of beryllium is two.
You question is a bit incorrect. Beryllium is a metallic element in Group (II) of the Periodic Table. Being in Group (II) it will have a strong tendency to loose electrons(ionisation). In its neutral state beryllium has the electron structure of 1s2, 2s2, This means that its inner most electron shell (1s) contains two electrons. Its outer most electron shell (2s) also contains two electrons. When beryllium ionises two electrons , they are 'lost' from the outer most (2s) electron shell. They are further from the nucleus of the atom and are not so strongly held.!!!!! When these two electrons have 'gone' , the Beryllium atom is now the Beryllium ION. (It is no longer an atom). Formulaically it is written as Be(g) = Be^(2+) + 2 e^(-) So for beryllium atom to become a Beryllium ION it LOSES TWO electrons.
The same numbers of protons and of electrons; the difference between isotopes is in the number of neutrons.
The number of protons is the same.
I might be wrong but: I know that beryllium has two electrons total and the first ring can only fit two electrons so the number of valance electrons is most likely two. Please correct me if I'm wrong.
The proton and electron number are equal for all isotopes of the same specific element.
2 electrons. He-4 and He-3 are the two most occuring isotopes.
Yes, gallium does have naturally occurring isotopes. The most common stable isotopes of gallium are gallium-69 and gallium-71, with gallium-69 being more abundant at about 60% and gallium-71 about 40%.
The number of protons is identical.
Different Isotopes of the same element will each exhibit the same Chemical Characteristics.