An atom has the following electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^3 how many valence electrons does this atom have? a) 2, b) 3, c) 5, or d) 11

another question : the electron configuration of an element is 1s^2 2s^2 2p^4. describe what most likely happens when two atoms of this element move towards each other