Table of Contents
- 1 Can you ever have more than 2 electrons in the first shell?
- 2 Why the third period contains only eight elements even though the electron capacity of the third shell is 18?
- 3 What are the elements in the first group have one outer shell electron and are extremely reactive?
- 4 How many electrons can the n=1 shell of an orbital hold?
Can you ever have more than 2 electrons in the first shell?
The first shell, closest to the nucleus and with the lowest-energy electrons, is shell 1. This first shell has only one subshell (labeled 1s) and can hold a maximum of 2 electrons. This is why there are two elements in the first row of the periodic table (H & He). The second shell has two subshells (labeled 2s and 2p).
How many electrons can the 1st period electron shell hold?
two 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.
What elements have 2 electrons in the outer shell?
In this table, you can see that helium has a full valence shell, with two electrons in its first and only, 1n, shell. Similarly, neon has a complete outer 2n shell containing eight electrons. These electron configurations make helium and neon very stable.
Why the third period contains only eight elements even though the electron capacity of the third shell is 18?
The third period contains only eight elements even though the electron capacity of the third shell is 18. This is because when the other shells get filled and the resultant no of electrons becomes eighteen, it gets added up and settles in the third electron shell and three shells are acquired by the fourth period.
Why does the first electron shell only hold two electrons?
There are at most two electrons in the first shell because of the Pauli Exclusion Principle, which says there can be only one electron with a given set of quantum values: only the spin can change, it can be -1/2 or +1/2. So that is two.
What is the maximum number of electrons which can be accommodated in n shell?
32 electrons
Answer: N shell can have a maximum of 32 electrons. The principal quantum number determines the maximum number of electrons that can be accommodated in a shell (n).
What are the elements in the first group have one outer shell electron and are extremely reactive?
Group 1 of the periodic table includes hydrogen and the alkali metals. Because they have just one valence electron, group 1 elements are very reactive.
Why the third period contain 8 elements and not 18?
According to the 2n2 rule, the maximum number of electrons in the third period = 2 x (3)2 = 18. But, the last shell cannot accommodate more than 8 electrons so, the number of electrons in third period is 8. Hence, the number of elements is also 8.
What is the maximum number of electrons that can fit?
In my textbook, it says that the maximum number of electrons that can fit in any given shell is given by 2n². This would mean 2 electrons could fit in the first shell, 8 could fit in the second she… Stack Exchange Network
How many electrons can the n=1 shell of an orbital hold?
An s-orbital holds 2 electrons. Thus n=1 shell can hold two electrons. The n=2 (second)shell has: The 2s orbital
What are the 8 elements in the periodic table of elements?
They are Helium, Neon, Argon, Krypton, Xenon, Radon and Ogannesson (please feel free to correct me on my spelling). They are referred to as Group 0 rather than Group 8 because the latter implies that all elements within said group have 8 electrons in their outer shell, which is not true for Helium, which has 2 electrons in its outer shell.
How many orbitals are in the p subshell of an atom?
For ℓ = 1, mℓ has three possible values: mℓ = − 1, 0, + 1. Thus the p subshell has three orbitals. The second shell has 2 subshells: the s subshell, which has 1 orbital with 2 electrons, and the p subshell, which has 3 orbitals with 6 electrons, for a total of 4 orbitals and 8 electrons.