How many electrons can the 2nd shell hold?

Why is 3rd shell 8 or 18?

In this sense the third shell can hold 8 electrons. In this sense the third shell can hold a total of 18 electrons. So the third shell can be considered to hold 8 or 18 electrons but in total the third shell can hold 18 electrons.

How many electrons in total does the shell with N 2 hold?

For example, for the first shell n = 1, and so 2n2 = 2. We have already seen that only two electrons can be in the n = 1 shell. Similarly, for the second shell, n = 2, and so 2n2 = 8. As found in Example 1, the total number of electrons in the n = 2 shell is 8.

How many electrons can the 4 Shell hold?

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Shell Subshell Total Number of Electrons in Shell
1st Shell 1s 2
2nd Shell 2s, 2p 2 + 6 = 8
3rd Shell 3s, 3p, 3d 2 + 6 + 10 = 18
4th Shell 4s, 4p, 4d, 4f 2 + 6 + 10 + 14 = 32

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.

Why are there 18 electrons in the third shell?

The 3rd subshell consists of an s orbital, a set of (3)p orbitals and a set of (5)d orbitals. Each orbital holds 2 electrons and you will indeed find that you can fir 18 electrons in. This is because it is the maximum capacity of the 3rd shell and it doesn’t tell about the order in which the electrons are filled.

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Why are there only 8 electrons in the outer shell?

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.

What is the 3rd quantum number?

The Third Quantum Number: Orientation in Three Dimensional Space. The third quantum number, m l is used to designate orientation in space. The figure-8 shape with ℓ = 1, has three shapes needed to completely fill the spherical shape of an electron cloud.

What is the maximum number of electrons in n 3?

Answer and Explanation: The maximum number of electrons that can be contained in the n = 3 level is 18. This electron shell has enough energy to contain three sublevels: s, p

How many electrons can 5s hold?

4. The fifth energy level contains: 5s (which holds 2 electrons ), 5p (which holds 6), 5d (holds 10), and 5f (holds 14) for a total of 32 electrons.

Would an electron have to absorb or release energy?

The electron can gain the energy it needs by absorbing light. If the electron jumps from the second energy level down to the first energy level, it must give off some energy by emitting light. The atom absorbs or emits light in discrete packets called photons, and each photon has a definite energy.

Can an atom make 8 bonds?

For that same reason, six or seven bonds are possible, and Xenon can form 8 covalent bonds in the compound XeO4! Meallic elements can definiely have more than eight valence electrons, however they do not tend to form covalent bonds.

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Why do atoms want 8 electrons?

A complete octet is very stable because all orbitals will be full. Atoms with greater stability have less energy, so a reaction that increases the stability of the atoms will release energy in the form of heat or light. A stable arrangement is attended when the atom is surrounded by eight electrons.

Why do electrons want a full outer shell?

The valence electrons ( outer -most electrons ) determine most of the bonding behavior in atoms. Atoms want a full outer shell because it completes all the gaps in the outside. With no gaps, other electrons don’t want to fit into those spaces. For example, a noble gas like Neon has a full outer shell.

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