1) Which chart organizes all known chemical elements? a) electron cloud model b) element palette c) periodic table d) revised periodic law 2) Which model describes the atomic structure having a positively charged nucleus, with electrons orbiting it in specific orbitals? a) Atom planetary model b) electron configuration c) electron cloud model d) electron orbit model 3) Who was credited with the idea that negatively charged electrons orbit a small, positively charged nucleus? a) Bohr b) Chadwick c) Rutherford d) Schrodinger 4) According to the Electron Cloud Model, how do electrons behave in an atom? a) Planet-like b) Wave-like c) Zigzag d) None of the above 5) According to the Electron Cloud Model, where are electrons located in an atom? a) layers b) nucleus c) orbits d) outside 6) Which region in the periodic table are the energy levels of the valence electrons? a) groups b) families c) periods d) positions 7) In Bohr's atomic model, orbitals are indicated by letters. Which of the following letters are used in naming Bohr's orbitals? a) A, B, C, D b) D, E, F, G c) G, H, I, J d) K, L, M, N 8) Energy level has different sublevels (s, p, d, f). Which among these occupy the 3rd energy level? a) s, p b) s, p, d c) s, p, d, f d) s, p, f 9) Each sublevel can have a maximum of a specific number of electrons. How many electrons can the sublevel p hold? a) 2 b) 4 c) 6 d) 8 10) Which of the following describes electron configuration? a) distribution of electrons in an atom's orbitals b) distribution of electrons in the valence shell 11) For 10 points, identify what element is in the given picture. a) Technecium b) Rhenium

WEEK 7: ELECTRON CLOUD AND ENERGY LEVELS

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