BCH 111 Theory Questions: Lewis Diagrams for Compound Formation – Orbital Shapes – Quantum Number Calculation (Balmer Series)

100 Level Department of Science Laboratory Technology exam questions and detailed answers. Download the answers in document format. Correct, detailed, and straightforward answers.

Questions:

a. Using Lewis diagram show the formation of the following compounds:
(i) NH₃
(ii) Cl₂
(iii) NaCl
(iv) CaO

b. Explain with diagram the shape of p-orbital and s-orbital.

c. Calculate the principal quantum number of the upper level when there is a transition by an electron in the Balmer series of 410 nm wavelength to n=2 (R_H = 1.097×10⁷ m⁻¹).

d. Write the electronic configuration of the following elements:
i. Aluminium
ii. Silicon
iii. Potassium

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