Question on Characteristics of Elements and Empirical Formula Use the following

Question

Question on Characteristics of Elements and Empirical Formula

Use the following information to identify elements T, X, D, and Z. Element T reacts with oxygen to form at least three compounds: TO, T2O3, and TO2. Element X reacts with oxygen to form XO2, but X is also known to form compounds in the +2 oxidation state. Element D forms D2O3, and element Z reacts vigorously and forms Z2O. Electrical conductivity measurements showed that element X exhibited electrical conductivity intermediate between metals and insulators, while elements T, D, and Z were good conductors of electricity. Element T is a hard, lustrous, silvery metal, element X is a blue-gray metal, element D is a light, silvery metal, and element Z is a soft, low-melting metal.

Explanation / Answer

From the information given, Metal Z can be an alkali metal say lithium (Li). Alkali metals are soft, low melting metal and they all react with oxygen to form oxides of formula Z2O and the surface of it turns dull. Element D forms an oxide of formula D2O3, so the oxidation state of D is +3. This can be a Group 13 elements say Boron (B). These metals great conductor of both heat and electricity ay high temperatures. X forms XO2 and XO type of compounds (+4 and +2 oxidation states). This can be from Group 14 elements say Silicon (Si). These metals tends to have electrical conductivity intermediate between metals and insulators. Metal T forms compounds with oxygen of formula TO (+2 oxidation state), T2O3 (+3 oxidation state) and TO2 (+4 oxidation state) in each cases. This could be thus chromium (Cr). These are hard, lustrous, silvery metal which are good conductor of electricity.

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