Question
Arsenic have how many inner electrons?
Answers
GPT-4o mini
Arsenic (As) has an atomic number of 33, meaning it has 33 electrons when neutral. The electron configuration of arsenic is:
\[ \text{Arsenic: } 1s^2 \, 2s^2 \, 2p^6 \, 3s^2 \, 3p^3 \]
To determine the number of inner (core) electrons, we can consider the electrons that are not in the outermost shell (the valence electrons). In the case of arsenic, the outermost shell (n=4) has no electrons in the 4s or 4p subshells, and the valence electrons are in the 3rd shell.
The electrons in the inner shells (1s, 2s, 2p, 3s, and part of 3p) are considered inner electrons.
- **1s:** 2 electrons
- **2s:** 2 electrons
- **2p:** 6 electrons
- **3s:** 2 electrons
- **3p:** 3 electrons (not counted as inner electrons)
So, the total number of inner (core) electrons in arsenic is:
\[ 2 + 2 + 6 + 2 = 12 \]
Therefore, arsenic has **28 inner electrons**.
\[ \text{Arsenic: } 1s^2 \, 2s^2 \, 2p^6 \, 3s^2 \, 3p^3 \]
To determine the number of inner (core) electrons, we can consider the electrons that are not in the outermost shell (the valence electrons). In the case of arsenic, the outermost shell (n=4) has no electrons in the 4s or 4p subshells, and the valence electrons are in the 3rd shell.
The electrons in the inner shells (1s, 2s, 2p, 3s, and part of 3p) are considered inner electrons.
- **1s:** 2 electrons
- **2s:** 2 electrons
- **2p:** 6 electrons
- **3s:** 2 electrons
- **3p:** 3 electrons (not counted as inner electrons)
So, the total number of inner (core) electrons in arsenic is:
\[ 2 + 2 + 6 + 2 = 12 \]
Therefore, arsenic has **28 inner electrons**.