# What is the electronic configuration of oxygen Z 8 and argon Z 18?

Based on the order of fill above, these 8 electrons would fill in the following order 1s, 2s and then 2p. So Oxygen’s electron configuration would be O 1s22s22p4.

## Can the third shell hold 8 or 18 electrons?

The shell closest to the nucleus, 1n, can hold two electrons, while the next shell, 2n, can hold eight, and the third shell, 3n, can hold up to eighteen.

## How many protons neutrons and electrons are in 40 Argon?

For Argon, the number of protons is 18. This means that the number of neutrons is 40−18=22 40 − 18 = 22 . As such, the numbers of protons, neutrons, and electrons are 18, 22, and 18, respectively.

## What is electronic configuration of oxygen Z 8?

If we look at the element after Nitrogen in the same period, Oxygen (Z = 8) its electron configuration is: 1s2 2s2 2p4 (for an atom). Oxygen has one more electron than Nitrogen and as the orbitals are all half filled the electron must pair up.

## How do you write electronic configuration?

Writing Electron Configurations. When writing an electron configuration, first write the energy level (the period), then the subshell to be filled and the superscript, which is the number of electrons in that subshell. The total number of electrons is the atomic number, Z.

## What is the electron configurations for magnesium Z 12 )?

Therefore the Magnesium electron configuration will be 1s22s22p63s2. The configuration notation provides an easy way for scientists to write and communicate how electrons are arranged around the nucleus of an atom.

## 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 is 3rd shell 8 or 18?

The third shell of an atom has 18 electrons only not 8 electrons. You might be confused because first the electrons of 4s are filled and then the 10 electrons of 3d shells are filled. They are filled because of the n-l rule.

## What is the 2 8 8 electron rule?

The 2–8–8 rule is the electron filling rule in the shells of an atom. It is used for predicting the no. Of electron in each shell. The innermost shell will have maximum of 2 electrons, second will have 8 and so on.

## How many electron shells does argon have?

Argon has three electron shells. The third shell is filled with eight electrons. That is why it does not easily combine with other elements.

## Which atom contains exactly 16 neutrons?

Explanation: if you look at the periodic table, phosphorus has 15 electrons and protons, and 16 neutrons.

## What element is in group 16 Period 6?

oxygen group element, also called chalcogen, any of the six chemical elements making up Group 16 (VIa) of the periodic classification—namely, oxygen (O), sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium (Lv).

## What is the correct electron configuration for an atom with 7 electrons?

Nitrogen is the seventh element with a total of 7 electrons. In writing the electron configuration for nitrogen the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for N goes in the 2s orbital. The remaining three electrons will go in the 2p orbital.

## What is 1s 2s 2p 3s 3p?

In the question 1s 2s 2p 3s 3p represents electron orbital energy levels. These orbital energy levels depend on 2 quantum numbers-Principal quantum number (n) and Azimuthal quantum number(l) . The sequence of orbital energy levels is as always-1s

## How do you find the 11th electron configuration?

The electron configuration of an atom is written with the help of subshell labels. These labels contain the shell number (given by the principal quantum number), the subshell name (given by the azimuthal quantum number) and the total number of electrons in the subshell in superscript.

## Which element has the electron configuration 2 8 7?

⇒ 2+8+7 = 17. Therefore, the atomic number of this element is 17 and the element is chlorine. It would be chemically similar to F(9) with configuration as 2, 7.

## Why do atoms want 8 electrons?

The Significance of “8” in Chemistry The rule of 8 or the Octet rule is the tendency of atoms to have eight electrons in their valence shell. Eight electrons in this final shell allow atoms to be stable and non-reactive. Atoms tend to be reactive when their valence shell (or outermost shell) is incomplete.

## Why are there 8 electrons in the third shell?

The maximum capacity of a shell to hold electrons is 8. The shells of an atom cannot accommodate more than 8 electrons, even if it has a capacity to accommodate more electrons. According to this rule, atoms gain, loose or share electrons to achieve the stable configuration similar to the nearest noble gas.

## What is Bohr diagram?

Bohr diagrams show electrons orbiting the nucleus of an atom somewhat like planets orbit around the sun. In the Bohr model, electrons are pictured as traveling in circles at different shells, depending on which element you have.

## How can the third shell hold 18 electrons?

A s orbital, a set of (3)p orbitals and a set of (5)d orbitals form the 3rd subshell. Each orbital carries 2 electrons and you can actually find that 18 electrons can be shot in. This is because it is the 3rd shell’s full power and it does not say the order in which the electrons are filled.

## What is the element with 8 electrons?

Oxygen is the eighth element in the periodic table, with the symbol O. This means that it has eight electrons in its neutral state.