The element that corresponds to the electron configuration 1s22s22p2 is

Electron configuration of the element is as follows 
1s² 2s² 2p²
total number of electrons = 6
number of protons = number of electrons in elements when they're neutral 
this means there are 6 protons and atomic number is equal to the number of protons 
the atomic number is characteristic to that element 
therefore element with atomic number  6 is carbon 
answer is carbon

257 grams h2o i think