+18
Because as you add more electrons to the same valence shell, the effective nuclear charge increases and thus holds the valence shell closer.
Argon is usually electrically neutral and has no charge. It is possible to ionize it, however (at very high temperatures or by means of a high voltage) at which point it would have a positive charge.
It doesn't become an argon atom because it (Cl-) still has 17 protons, and an argon atom has to have 18 protons.
Zinc has 30 protons; the term "nuclear charge" is rarely used.
The effective nuclear charge (Z_eff) acting on an electron is influenced by the shielding effect caused by other electrons in the atom. While the actual nuclear charge (Z) is simply the total number of protons in the nucleus, the presence of inner-shell and other electrons reduces the full attractive force felt by outer-shell electrons. As a result, Z_eff is often less than Z, reflecting the net positive charge experienced by an electron due to partial shielding. Consequently, the effective nuclear charge can be thought of as the actual nuclear charge minus the shielding effect from other electrons.
The effective nuclear charge for an electron in the outermost shell of a fluorine atom (F) is approximately +7. This charge results from the balancing of the positive charge of the nucleus with the shielding effect of inner electrons.
To determine the effective nuclear charge (Z effective) of an atom, you can subtract the number of inner shell electrons from the atomic number of the element. This gives you the net positive charge experienced by the outermost electrons, which is the effective nuclear charge.
The electron configuration of argon is [Ne] 3s2 3p6. From this, we can see that the outer shell contains eight electrons.
Argon is an atom. It is a noble gas with a full outer electron shell, so it does not readily form ions.
The atomic radius of an argon atom is about 188 picometers. Argon is a noble gas and is known for its inertness and stability due to its full outer electron shell.
An atom of argon has a completely filled outer shell. If you know about bonding, you will get what I mean. The argon atom does not want to give or receive or give electrons because it is already as stable as possible.
Atoms of argon have a full outer (valence) shell, and this is why argon is inert. The electrons of an atom have different energy levels. It's conventional to call each collection of possible states of electrons for a given energy level a shell. Shells have finite capacity and argon has a full outer shell. Chemical reactions tend to rely on electrons jumping from one atom to another or two sharing the orbit of 2 electrons (a type of shell around 2 electrons if you like). If the shells are full it is usually more energy efficient for an electron to stay put rather than jump to another atom. consequently argon with its full shells rarely bonds.
Because as you add more electrons to the same valence shell, the effective nuclear charge increases and thus holds the valence shell closer.
Because as you add more electrons to the same valence shell, the effective nuclear charge increases and thus holds the valence shell closer.
Protons determine the nuclear charge of an atom. Each proton carries a positive charge and is located in the nucleus of an atom. The number of protons in an atom determines its atomic number and therefore its nuclear charge.
The atomic size of an element is primarily determined by the number of electron shells and the effective nuclear charge experienced by the outermost electrons. In the case of argon and chlorine, argon has an additional electron shell compared to chlorine, resulting in a larger atomic size. This additional electron shell in argon leads to greater electron-electron repulsions that push the outer electrons farther away from the nucleus, increasing the atomic size.
It doesn't become an argon atom because it (Cl-) still has 17 protons, and an argon atom has to have 18 protons.