The element with atomic number 33 belongs to

Options

A. group 13
B. group 14
C. group 15
D. group 16

Answer

To determine which group the element with atomic number 33 belongs to, we can follow these steps:

### Step 1: Identify the Element
The element with atomic number 33 is arsenic (As).

### Step 2: Write the Electronic Configuration
The electronic configuration of arsenic can be determined by filling the orbitals according to the Aufbau principle.

1. Start with the first two electrons filling the 1s orbital:
- 1s²
2. Next, fill the 2s and 2p orbitals:
- 2s² 2p⁶
3. Then fill the 3s and 3p orbitals:
- 3s² 3p⁶
4. After that, fill the 4s orbital:
- 4s²
5. Finally, fill the 3d and 4p orbitals:
- 3d¹⁰ 4p³

Putting it all together, the electronic configuration for arsenic (atomic number 33) is:
- 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p³

### Step 3: Determine the Group
The outer electronic configuration of arsenic is 4s² 4p³. The presence of three electrons in the p orbital indicates that arsenic belongs to group 15 of the periodic table, also known as the nitrogen family.

### Step 4: Conclusion
Thus, the element with atomic number 33 (arsenic) belongs to group 15 of the periodic table.

### Final Answer
The element with atomic number 33 belongs to the nitrogen family (group 15).

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