The total value of m for all electrons in N atom is ______. 

Answer

To find the total value of the magnetic quantum number (m) for all electrons in a nitrogen atom, we will follow these steps:

### Step 1: Determine the electronic configuration of nitrogen.
- The atomic number of nitrogen (N) is 7, which means it has 7 electrons.
- The electronic configuration of nitrogen is:
\[ 1s^2 \, 2s^2 \, 2p^3 \]

### Step 2: Identify the orbitals and their corresponding magnetic quantum numbers (m).
- The magnetic quantum number (m) can take values based on the type of orbital:
- For the s orbital (1s and 2s), m = 0.
- For the p orbital (2p), m can be -1, 0, or +1.

### Step 3: Assign the m values to the electrons in each orbital.
- For the 1s orbital (2 electrons):
- Both electrons have m = 0.

- For the 2s orbital (2 electrons):
- Both electrons have m = 0.

- For the 2p orbital (3 electrons):
- The possible m values are -1, 0, and +1.
- We can assign the m values as follows:
- 1 electron with m = -1
- 1 electron with m = 0
- 1 electron with m = +1

### Step 4: Calculate the total value of m.
- Now, we sum the m values for all the electrons:
- From 1s: \(2 \times 0 = 0\)
- From 2s: \(2 \times 0 = 0\)
- From 2p: \(-1 + 0 + 1 = 0\)

- Total value of m:
\[ 0 + 0 + 0 = 0 \]

### Final Answer:
The total value of m for all electrons in a nitrogen atom is **0**.

---