Inorganic Chemistry Exam With 100% Correct Answers

Inorganic Chemistry Exam With 100% Correct Answers Trends in atomic radius in period 3 - answerAtomic radius decreases from Na to Cl, nuclear charge increases, electrons are added to the same shell so nuclear attraction increases pulling the shells in Why can't atomic radius be measured for argon? - answerArgon exists as single atoms (monoatomic) and does not form any bonds best electrical conductor - answerAluminium as it has 3 delocalised electrons Sodium flame colour - answeryellow Magnesium flame colour - answerbright white Aluminium flame colour - answerwhite Silicon flame colour - answerWhite Phosphorus flame colour - answerWhite or yellow Sulfur flame colour - answerBlue how alkaline a solution will be depends on - answerthe strength of the lattice - stronger lattices don't break easily. They decompose to form less OH- ions. Since the conc of OH- is less, the pH is also less. Proof of amphoteric nature of aluminium oxide - answerAl2O3 + 6HCl -> 2AlCl3 + 3H2O Al2O3 + 2NaOH (+3H2O) -> 2NaAl(OH)4 AlCl3 + H2O (ionic) - answerAlCl3 + H2O ️ Al(H2O)₆³+ + Cl³- SiCl4 + H2O - answerSiCl4 + 2H2O ️ SiO2 + 4H+ + 4Cl- SiCl4 + 2H2O ️ SiO2 + 4HCl trends in melting point in group 2 - answerMelting point decreases due to -increasing cation size -decreasing density of 2+ charged cati