Table of Contents
- 1 Why does 8 electrons form a stable shell?
- 2 How can atoms that don’t have 8 valence electrons get to that stable configuration?
- 3 Can the first shell hold 8 electrons?
- 4 Why do 8 electrons form a stable shell?
- 5 How many electrons must an atom have in its valence shell?
- 6 Why is hydrogen stable with 2 electrons?
Why does 8 electrons form a stable shell?
Atoms with 8 electrons in their valence shell have completely filled last orbitals and are therefore the most stable, as their electronic configuration is similar to that of the closest noble gas.
How can atoms that don’t have 8 valence electrons get to that stable configuration?
Only the noble gases have an octet of valence electrons naturally (two for helium, which is called a duet). Therefore, atoms that don’t have an octet share their valence electrons with other atoms so that they each will have an octet (or duet in the case of hydrogen).
Can the first shell hold 8 electrons?
Each successive shell can only hold a certain number of electrons. The innermost shell is filled first. This shell can contain a maximum of two electrons. The second shell can hold a maximum of eight electrons….Electron shells.
| Energy shell | Maximum number of electrons |
|---|---|
| Second | 8 |
| Third | 8 |
Why does we fill 8 electrons in 3rd shell?
The 4s subshell has less energy than the 3d subshell. So after filling the 3s and 3p subshell with 8 electrons, the next shell to fill is the 4s one. Only when that is full, the remaining 10 electron positions in the 3d subshell will get filled. The third shell of an atom has 18 electrons only not 8 electrons.
How many electrons can 4th shell hold?
32
Each shell must be full before the next starts to fill. This model breaks down at the n=3 shell because each shell has subshells. There are 4 subshells, s, p, d, and f. Each subshell can hold a different number of electrons….Search form.
| n= | Shell | Maximum Number of Electrons |
|---|---|---|
| 2 | 2nd Shell | 8 |
| 3 | 3rd Shell | 18 |
| 4 | 4th Shell | 32 |
Why do 8 electrons form a stable shell?
Most of these answers seem to be effectively saying, “8 electrons form a stable shell because the valence shell has 8 slots and a full shell is the most stable configuration,” but I think the real question being asked is, “why does the valence shell have 8 slots in the first place?”
How many electrons must an atom have in its valence shell?
Since an atom is energetically satisfied when all of the electrons are paired and 2+6 = 8, an atom must have 8 electrons in its valence shell to pair all of the electrons.
Why is hydrogen stable with 2 electrons?
Since electrons can be spin up or spin down, this means there are 2 total slots available. This is why hydrogen and helium are stable with 2 electrons — because those 2 electrons fill the n=1 shell. For the next energy shell (n=2), l can be 0 to 1.
Why are electrons arranged in the Th shell of an atom?
This arrangement led to a very stable state of atoms, due to their resemblance to noble gases. The n th shell of an electron will accommodate 2n 2 number of electrons, where n is the principal quantum number or the energy level.