Question

For each element, count the number of core electrons, valence electrons, and unpaired electrons in the ground state.

Part A carbon Express your answers as an integers. Enter your answers in corresponding order separated by commas. Part B phosphorus Part C neon

Answer 1

Part A carbon with atomic number 6
Ground state electronic configuration 1s²2s²2p²
Number of core electrons 2
Number of valence electrons 4
Number of unpaired electrons 2

Part B phosphorous with atomic number 15
Ground state electronic configuration 1s²2s²2p⁶3s²3p³
Number of core electrons 10
Number of valence electrons 5
Number of unpaired electrons 3

Part C neon with atomic number 10
Ground state electronic configuration 1s²2s²2p⁶
Number of core electrons 2
Number of valence electrons 8
Number of unpaired electrons 0