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# Does Ar have 8 valence electrons?

## Does Ar have 8 valence electrons?

Argon is a noble gas with an electron configuration of [Ne]3s23p6 . In the third shell, it holds a total of 2+6=8 electrons, so it has 8 valence electrons.

How many core and valence electrons does Ar have?

Argon contains 18 electrons, so calcium contains 18 core electrons. Note that the valence electrons are often all of those after the noble gas core, but not always. Valence = The 5p sublevel is unfilled, so the 5p and 5s sublevels contain the valence electrons.

Why does gaining or losing electrons help make an atom stable?

Some atoms are more stable when they gain or lose an electron (or possibly two) and form ions. This fills their outermost electron shell and makes them energetically more stable. Because the number of electrons does not equal the number of protons, each ion has a net charge.

### What is the full electron configuration for AR?

[Ne] 3s² 3p⁶
Argon/Electron configuration

What is the electron of AR?

18

Name Argon
Number of Neutrons 22
Number of Electrons 18
Melting Point -189.3° C
Boiling Point -186.0° C

How to tell how many valence electrons?

If you look at the periodic table and at the period numbers, that is the number of valence electrons. If the number is larger than 10, subtract 10 so you get two valence electrons. Example: Oxygen is in the 16th period. If we subtract 10 from 16, we get 6; therefore, oxygen has six valence electrons.

#### What elements have valence electrons?

A: Any element in group 1 has just one valence electron. Examples include hydrogen (H), lithium (Li), and sodium (Na). Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons). Examples include neon (Ne), argon (Ar), and krypton (Kr).

How do you calculate valence?

Subtract the number of electrons on the outermost shell of the atom by eight to obtain the number of valence electrons. For example, if the outermost shell of Potassium contains only one electron, the number of valence electrons is seven (8 – 1 = 7)

How many valence electrons do each of the noble gases have?

The noble gases are the elements at the far right-hand column of the periodic table: helium, neon, argon , xenon , and radon. Because of the group they belong to, they each have a full valence shell or level. In the case of helium, a full valence shell has two electrons, and in the remaining noble gases, eight electrons make up a full valence shell.