18
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
The electron configuration of argon is [Ne] 3s2 3p6. From this, we can see that the outer shell contains eight electrons.
Argon is atomic number 18. It would therefore have 18 protons. Having 18 protons would mean that Argon must also have 18 electrons.
There are 6 2p electrons in argon.
Argon has 10 core electrons. Subtract the amount of valence electrons from your total amount of electrons. 18-8= 10
6
In a neutral atom, the charge on the electron cloud is balanced by the carge on the atom's nucleus. The nucleus has a positive charge proportional to the number of protons in it. This attracts and holds the negatively charged electrons in the electron cloud. And in a neutral atom (not an ion), there will be as many electrons in the electron cloud as protons in the nucleus. The charges will balance.
2
17
7
None, electrons are in the electron cloud, not the nucleus
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
The electron configuration of argon is [Ne] 3s2 3p6. From this, we can see that the outer shell contains eight electrons.
The first ring of the electron cloud holds two electrons. All rings following it hold eight.
One more electron.
Sulfur needs to gain 2 electrons to have the electon configuration of Argon
It is impossible to know exactly where an electron is. Thus, the size of an electron cloud can be given only in terms of probability. Even then, the size of the electron cloud depends on how many electrons an atom possesses.