An element is defined as atoms with the same number of protons (and thus electrons). Beryllium has 4 protons and 4 electrons. The number of neutrons is determined by subtracting the atomic number from the Atomic Mass. At least three isotopes of Beryllium have been identified but there is only one stable naturally occurring isotope - Beryllium 9. If there are 4 protons, there must be 9 - 4 = 5 netrons in this isotope. The other stable isotope is beryllium 10 with a half life of 2,700,000 years and this must have 6 neutrons. This does not occur naturally but is made in atomic reactors. The other identified isotope is Beryllium - 8 which is made in the same way but immediately splits into two helium nuclei. So for most naturally occurring Beryllium, there are 5 Neutrons.
A neutral atom of Beryllium has 2 outer electrons. Beryllium has an electron configuration of 1s2 2s2, meaning it has 2 electrons in its outermost energy level, which is the second energy level (2s).
One beryllium atom has four (4) electrons, four (4) protons, and three (3), five (5) or six (6) neutrons, depending on the isotope being considered. The only stable isotope is Beryllium-9 (with 5 neutrons) but beryllium-10 (with 6 neutrons) has a relatively long half-life of 1.51 million years.
All beryllium atoms have 4 protons and 4 electrons. The number of neutrons is characteristic of a particular isotope, not of beryllium as a whole, and may be determined by subtracting 4, the number of protons, from the mass number of the isotope.
A neutral carbon atom contains 6 protons, 6 neutrons, and 6 electrons. The number of protons and electrons is equal, giving the atom a neutral charge.
There are 7 neutrons in a neutral 13 6C atom. This is determined by subtracting the atomic number (6) from the mass number (13).
The most important isotope of beryllium - 9Be - has 5 neutrons. The neutral atom of beryllium has 4 electrons.
Beryllium (watch the spelling) is element number 4. That means that a beryllium atom has 4 protons; if the atom is neutral it has 4 electrons (however, it might not be neutral, in this case it can have more or less), and the number of neutrons varies, depending on the isotope - between 1 and 13 neutrons in the case of beryllium.
4 protons 4 electrons 5 neutrons
A neutral atom of Beryllium has 4 electrons. (Its atomic number is 4)
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The atomic number of an atom tells you how many protons that atom has. Beryllium's atomic number is 4. That means that, regardless of how many neutrons a given isotope of beryllium may have, it will always have 4 protons.
A neutral atom of Beryllium has 2 outer electrons. Beryllium has an electron configuration of 1s2 2s2, meaning it has 2 electrons in its outermost energy level, which is the second energy level (2s).
One beryllium atom has four (4) electrons, four (4) protons, and three (3), five (5) or six (6) neutrons, depending on the isotope being considered. The only stable isotope is Beryllium-9 (with 5 neutrons) but beryllium-10 (with 6 neutrons) has a relatively long half-life of 1.51 million years.
no electrons
All beryllium atoms have 4 protons and 4 electrons. The number of neutrons is characteristic of a particular isotope, not of beryllium as a whole, and may be determined by subtracting 4, the number of protons, from the mass number of the isotope.
A neutral atom with 53 protons in its nucleus would also have 53 electrons orbiting the nucleus. This is because the number of protons and electrons in an atom are equal, giving a neutral charge overall.
Beryllium typically has 4 electrons in total. It has 2 electrons in its inner shell and 2 electrons in its outer shell.