What is how many electrons does the third shell hold?

The third electron shell, also known as the M shell, can hold a maximum of 18 electrons. This is because it has three subshells: the s subshell, the p subshell, and the d subshell.

• The s subshell can hold up to 2 electrons. (https://www.wikiwhat.page/kavramlar/s%20Subshell)
• The p subshell can hold up to 6 electrons. (https://www.wikiwhat.page/kavramlar/p%20Subshell)
• The d subshell can hold up to 10 electrons. (https://www.wikiwhat.page/kavramlar/d%20Subshell)

Therefore, 2 + 6 + 10 = 18 electrons. This capacity is determined by the formula 2n², where n is the shell number (in this case, 3). (https://www.wikiwhat.page/kavramlar/Electron%20Shell)