All apart from Hydrogen.
The fourth electron shell is filled by krypton. Krypton is the last element in the fourth period on the periodic table. Each of the periods represents an electron shell. Elements in the first period have electrons in the first shell; elements in the second period have electrons in the second shell; and so on.
These elements, known as the alkali metals (group 1A) and alkaline earth metals (group 2A), are those in which the outer-shell s orbitals are being filled. On the right is a block of six columns. These are the elements in which the outermost p orbitals are being filled.
I reacts in order to get a filled valence shell of electrons.
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The 3rd shell can contain 18 electrons. The elements that have a 3rd shell as the outer shell are the the elements in period 3, where the 3s and 3p orbitals are filled to a maximum of 8 electrons. The 3d orbitals are filled in the 4th period in the transition elements.
There are two electrons in the valance shell of helium. Since this is the first shell, it is filled by two electrons.
be stable because the first shell is filled with electrons, providing it with a stable configuration. The second shell having 3 electrons will also fulfill the octet rule, making the atom more stable.
The outer shell is completely filled.
No. The valence shell of each atom in the compound is filled, each achieving a noble gas configuration.
Carbon has two electrons in its inner shell and four in its outer shell.
All the noble elements to the far right of the periodic table have their s and P sublevels in their valence shell filled, hence they are nonreactive.
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.