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. The general formula is that the nth shell can in principle hold up to 2(n 2 ) electrons.
Does shell have to contain electrons in order to exist?
In general, atoms are most stable, least reactive, when their outermost electron shell is full. Most of the elements important in biology need eight electrons in their outermost shell in order to be stable, and this rule of thumb is known as the octet rule.
Does a shell have to contain electrons to exist?
One electron can be boosted to many different energy levels. ... (A shell is just a conceptual model; hence; it doesn t really exist with or without the electron,A shell is just a region of space which may or may not contain electrons,A shell is a form of energy that requires electrons in order to exist.)
How many electrons does inside shell have?
| Energy shell Maximum number of electrons | First 2 | Second 8 | Third 8 |
|---|
Why is 3rd shell 8 or 18?
In this sense the third shell can hold 8 electrons . 4s2 not the third shell, but the next 10 electrons go into the 3d orbitals that are part of the third shell but shown on the fourth shell level. ... So the third shell can be considered to hold 8 or 18 electrons but in total the third shell can hold 18 electrons.
Why are there 18 electrons in the third shell?
Each shell can contain only a fixed number of electrons, up to two electrons can hold the first shell, up to eight (2 + 6) electrons can hold the second shell, up to 18 (2 + 6 + 10 ) can hold the third shell and so on. The general formula is that the nth shell can hold up to 2(n 2 ) electrons in principle.
Why are there 2 electrons in the first shell?
This first shell has only one subshell
How many electrons are in the 5 shell?
| Energy Level (Principal Quantum Number) Shell Letter Electron Capacity | 2 L 8 | 3 M 18 | 4 N 32 | 5 O 50 |
|---|
Why first shell is called K shell?
The names of the electron shell were given by a spectroscopist named Charles G Barkla. He named the innermost shell has k shell because he noticed that the X-rays emitted two types energies . ... He noticed that K type X-rays emitted the highest energy. Therefore, he named the innermost shell as the K shell.
What is the 2 8 8 rule in chemistry?
There is a 2-8-8 rule for these elements. The first shell is filled with 2 electrons, the second is filled with 8 electrons, and the third is filled with 8 . You can see that sodium (Na) and magnesium (Mg) have a couple of extra electrons. They, like all atoms, want to be happy.
Why are there 8 electrons in the outer shell?
The rule of 8 or the Octet rule
Can the third shell hold 18 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.
How many electrons can the 4 shell hold?
| n= Shell Maximum Number of Electrons | 2 2nd Shell 8 | 3 3rd Shell 18 | 4 4th Shell 32 |
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What you call an element if it has 18 electrons in penultimate shell and 3 electrons in outer most shell?
Detailed Solution. The correct answer is p-block element . The penultimate shell means the 2nd last shell in which electrons are filled in an atomic orbital. The electrons present in the Outermost shell of an atom are known as the valence electrons.
What can hold up to 2 electrons?
The closest orbital to the nucleus, called the 1s orbital , can hold up to two electrons. This orbital is equivalent to the innermost electron shell
Are electron orbitals real?
Let me approach this another way than the others: orbitals are NOT physical objects ! They do not exist in physical sense, they are theoretical constructs, chemical concepts that help understand / visualize / etc.
