Table of Contents
Can the outermost shell in an atom have more than 8 electron?
The shells of an atom cannot accommodate more than 8 electrons, even if it has a capacity to accommodate more electrons. This is a very important rule called the Octet rule. According to this rule, atoms gain, loose or share electrons to achieve the stable configuration similar to the nearest noble gas.
How many electrons can the penultimate shell have?
-In transition elements, the last shell contains one or two electrons. Penultimate shell may contain more than eight and up to eighteen electrons.
Does every shell have 8 electrons?
Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. For an explanation of why electrons exist in these shells see electron configuration.
Why can some atoms have more than 8 electrons?
Some molecules can accommodate more than 8 valence electrons because they have expanded valence shells. These molecules are from periods 3 or higher because starting from n=3, atoms have d-orbitals that can accommodate for more that 9 valence electrons.
Which element can accommodate more than 8 electrons in its valence shell?
Sulfur
Sulfur, phosphorus, silicon, and chlorine are common examples of elements that form an expanded octet. Phosphorus pentachloride (PCl5) and sulfur hexafluoride (SF6) are examples of molecules that deviate from the octet rule by having more than 8 electrons around the central atom.
What is penultimate shell electrons?
Penultimate shell is the shell just before the valence or the ultimate shell .i.e., the second last shell of the atom.
What is penultimate shell and anti-penultimate shell?
The last nucleus shell or outermost shell is called the valence shell. The shell under the valence shell is known as the penultimate shell And the one shell that is internal to penultimate is called the anti-penultimate shell, or pre-penultimate shell.
Why are there 8 electrons in the second shell?
Because the first shell can only hold a maximum of 2 electrons, the third electron must go into the second shell. The 2s subshell holds a maximum of 2 electrons, and the 2p subshell holds a maximum of 6 electrons. This means that the second shell can hold a maximum of eight electrons (2+6=8).
Why are only 8 electrons allowed in the outermost shell?
The presence of 8 electrons in the outermost shell makes the atom very stable. Due to this rule the shells M and N which have the capacity to hold more than eight electrons are allowed to hold only 8 electrons. Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.
How many electrons does the third shell of the atom hold?
So the third shell can be considered to hold 8 or 18 electrons but in total the third shell can hold 18 electrons.
Why can’t an atom have more than 8 electrons?
The shells of an atom cannot accommodate more than 8 electrons, even if it has a capacity to accommodate more electrons. This is a very important rule called the Octet rule. According to this rule, atoms gain, loose or share electrons to achieve the stable configuration similar to the nearest noble gas.
Which element has more than 32 electrons in one shell?
No known element has more than 32 electrons in any one shell. This is because the subshells are filled according to the Aufbau principle. The first elements to have more than 32 electrons in one shell would belong to the g-block of period 8 of the periodic table.