2 because it has two outer shell electrons out of 8 (relevant rule only for the first 20 elements)
Beryllium has 4 electrons.
Beryllium (Be) has an atomic number of 4, which means it has 4 electrons in its neutral state. When beryllium forms a +2 ion (Be²⁺), it loses 2 electrons, resulting in 2 electrons remaining. Therefore, a beryllium ion (Be²⁺) has 2 electrons.
Beryllium has a total of four electrons. Its electron configuration is 1s² 2s², meaning it has two electrons in the 1s orbital, which are considered core electrons. Therefore, beryllium has two core electrons.
Beryllium-10 has 4 protons and 4 electrons. Since the atomic number of beryllium is 4, this is how many protons and electrons it has. Beryllium-10 is an isotope, which means it has 6 neutrons, as the total mass number of beryllium-10 is 10.
The beryllium atom has 4 electrons and the valence is 2.
2
Beryllium has two valence electrons.
Beryllium has 4 electrons.
Beryllium has 4 electrons.
The electrons in beryllium occupy a total of four orbitals. Beryllium has 4 electrons, which fill the 1s, 2s, and 2p orbitals.
The most important isotope of beryllium - 9Be - has 5 neutrons. The neutral atom of beryllium has 4 electrons.
6
Beryllium (Be) has an atomic number of 4, which means it has 4 electrons in its neutral state. When beryllium forms a +2 ion (Be²⁺), it loses 2 electrons, resulting in 2 electrons remaining. Therefore, a beryllium ion (Be²⁺) has 2 electrons.
Beryllium has a total of four electrons. Its electron configuration is 1s² 2s², meaning it has two electrons in the 1s orbital, which are considered core electrons. Therefore, beryllium has two core electrons.
Beryllium has one outer electron shell with two electrons.
There are four electrons in atomic beryllium.
Beryllium has two valence electrons.