Write the electron configurations for the following atoms. Do not use shorthand notation, and use parenthesis. Do not put spaces in your answer. For example, enter the configuration for Na as 1s(2)2s(2)2p(6)3s(1). a) S:
b) K:
c) Ti:
d) Sn:

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.