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When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as A) Pauli exclusion principle. B) Hund’s rule. C) Aufbau principle. D) Heisenberg uncertainty principle.  

What are the possible orbitals for n = 3? A) s, p, d B) s, p, d, f C) s D) s, p

Identify the characteristics of a gas. A) definite volume and definite shape B) definite volume and no definite shape C) no definite shape and definite volume D) no definite shape and no definite volume

Calculate the energy of the violet light emitted by a hydrogen atom with a wavelength of 410.1 nm. A) 4.85 × 10-19J B) 2.06 × 10-19J C) 1.23 × 10-19J D) 8.13 × 10-19J E) 5.27 × 10-19J

Give the ground-state electron configuration for Se. A) [Ar]4s23d104p4 B) [Ar]4s24d104p4 C) [Ar]4s23d104p6 D) [Ar]4s23d10 E) [Ar]3d104p4

What does “X” represent in the following symbol?    80       X  35     A) mercury B) chlorine C) scandium D) bromine E) selenium

Determine the number of protons(p+), neutrons (n) and electrons (e) in the following element X.       25           X   12 A) p+= 12 n° = 25            e- = 12 B) p+= 12 n° = 12            e- = 13 C) p+= 12 n° = 13            e- = 12 D) p+= 25 n° = 12            e- = 13 E) p+= 12 n° = 13            e- = 25

What total energy (in kJ) is contained in 1.0 mol of photons, all with a frequency of 2.75 × 1014 Hz? A) 182 kJ B) 219 kJ C) 457 kJ D) 326 kJ E) 110 kJ

Rutherford’s Gold Foil Experiment helped prove A) the diameter of a gold atom. B) the exact charge of an electron. C) the exact mass of a gold atom. D) that the mass of an atom is concentrated in a very small space. E) the mass to charge ratio of an electron.

Which reaction below represents the electron affinity of Li? A) Li(g) + e⁻ → Li⁻(g) B) Li(g) → Li⁺(g) + e⁻ C) Li(g) + e⁻ → Li⁺(g) D) Li⁺(g) → Li(g) + e⁻ E) Li⁺(g) + e⁻ → Li(g)