To be an effective antibiotic or chemotherapeutic agent, it is necessary 

Which of the following types of electromagnetic radiation has the lowest frequency? A) yellow B) blue C) orange D) green E) purple

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

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

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