Since you split water into separate hydrogen and oxygen atoms, is it possible to ‘make’ water by putting them together

Question: Since you split water into separate hydrogen and oxygen atoms, is it possible to 'make' water by putting them together so to speak?
- Keywords:
- Royal Society of Chemistry: Find out more on:
  
  atom
  
  energy
  
  subatomic
Asked by to Veronica on 16 Jun 2014. This question was also asked by .
- Veronica Celorrio answered on 16 Jun 2014:
  
  Of course! and you can make energy in the process!
  
  These devices are calles “fuel cells”. They put back together hydrogen and oxygem, producing energy and water as a residue.
  
  You can watch a cool video which explains how do they work here:
  
  http://kids.usa.gov/watch-videos/science/hydrogen-fuel-cells/index.shtml

Question: Since you split water into separate hydrogen and oxygen atoms, is it possible to 'make' water by putting them together so to speak?