3 shells; 2 electrons in the first shell, 8 in the second shell and 8 in the third shell.
there are 2 completely full shells in argon. Argon= 18 electrons. 2 first shell 8 second shell (full) and 8 third shell (full)
Polonium has 6 electron shells.
A sulfur atom has 3 electron shells.
Chromium has two electrons in the outer most shell.
Thallium has 6 electron shells.
FULL
full
Their outermost electron shells are full.
there are 2 completely full shells in argon. Argon= 18 electrons. 2 first shell 8 second shell (full) and 8 third shell (full)
Argon has 18 electrons in its electron cloud.
Bromine has 4 electron shells.
Polonium has 6 electron shells.
Magnesium has three electron shells. The electron configuration is 2,8,2
Sodium, i believe has 3 shells.
A sulfur atom has 3 electron shells.
This question is unclear. If you mean 3 full electron shells and nothing else, then it would be argon. But every element after argon has 3 full electron shells also, but they also have other shells with electrons. If you mean a full 3rd energy shell such as in having 3d10 electrons, then it would be Zn but Zn also has 4s2 electrons. So, the question is a vague one.
Uranium has 92 electrons, which means it has 7 electron shells.