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CHM307


Question: Niels Bohr (1923) was the first to proposed the ----------------------- in the properties of the elements
Answer: [C] periodicity

Question: In chemistry, the term “electron configuration” refers to the arrangement of -------------- as they “orbit” around the nuclei of one, or more, atoms.
Answer: [D] electrons;

Question: The main thing about Pauli’s Exclusion principle is that
Answer: [A] No two electrons in a single atom can have the same four quantum numbers

Question: The four quantum numbers which can be used to describe the electrons in an atom include the following except
Answer: [C] Aufbau quantum number

Question: According to Aufbau principle, the order of orbital energies for a given element is ­_______
Answer: [A] Fixed

Question: Electron configuration was first conceived of under the ------------------------------------of the atom
Answer: [A] Bohr model

Question: A p-sublevel (p-orbital) has ________ orbitals
Answer: [B] 3

Question: the numbers of protons are--------------------------------------- as we go across a period.
Answer: [B] increasing

Question: The valence shell is also the ________ electron shell
Answer: [C] Outermost

Question: electron configuration of ---------------------- is written as [Ne] 3s2 3p3.
Answer: [A] phosphorus