What is the noble gas electron configuration of aluminum (Al)? A. [Ne] 3s^23p^1
B. [Ne] 2s^22p^1
C. [Ar] 3s^2 3p^1
D. [Ar] 1s^22s^2 2p^63s^2 3p^1

Which of the following observations indicates that an atom has neutrons? some uncharged particles are scattered by a beryllium atom when it hits a gold foil. some uncharged particles bounce back from a gold foil when it is bombarded with alpha particles. a radiation consisting of uncharged particles is emitted when alpha particles strike beryllium atoms. a radiation which attracts electrons is produced when a beryllium atom is bombarded with alpha particles.