Find and list 7 elements of the periodic table.
Sure, here are seven elements of the periodic table:
1. Hydrogen (H) 
2. Helium (He) 
3. Carbon (C) 
4. Nitrogen (N) 
5. Oxygen (O) 
6. Sodium (Na) 
7. Chlorine (Cl)
Complete the following task based on the instruction and optional input provided.### Instruction:
Find and list 7 elements of the periodic table.

### Output:
Sure, here are seven elements of the periodic table:
1. Hydrogen (H) 
2. Helium (He) 
3. Carbon (C) 
4. Nitrogen (N) 
5. Oxygen (O) 
6. Sodium (Na) 
7. Chlorine (Cl)