the first shell of electrons has only 2 spaces in it before it is full whereas the 2nd shell has 8 electrons in it to be full.
there are two electrons the first shell hold
In the first shell there are two electrons and in the second shell there are six electrons, but only the electrons in the second (outer) shell are valence electrons.
Two electrons can fit in the first shell
there are two electrons the first shell hold
There are two electrons in the valance shell of helium. Since this is the first shell, it is filled by two electrons.
In the first shell of oxygen, there are 2 electrons, and in the second shell, there are 6 electrons. Oxygen has 8 electrons in total, with 2 of them in the first shell and the remaining 6 in the second shell.
Electrons are not located in the nucleus of an atom.
Oxygen has 8 electrons (assuming its charge is 0), and in the first shell ("closest" to the nucleus) there are 2 electrons. :)
Beryllium like every other element excluding hydrogen has 2 electrons in its first shell.
Carbon has 2 electrons in it's first electron shell. All elements except hydrogen do.
The first shell of an atom can hold a maximum of 2 electrons. Since sodium has an atomic number of 11, the first shell will be filled with 2 electrons, and the remaining 9 electrons will go into the second shell.
There are two electrons in the first shell of neon. Its complete electronic configuration is 2,8