Account for the following: (i) Ammonia is more basic than phosphine. (ii) Elements of Group 16 generally show lower value of first ionisation enthalpy compared to the elements in the corresponding periods of Group 15. (iii) Electron gain enthalpy with negative sign for fluorine is less than that for chlorine.

Q: An element forms an oxide, E₂O₃, and a fluoride, EF₃.(a) Of which two groups might E be a member?(b)…

A: a. (a) When element E form oxide E2O3 then oxidation state of E is +3. When it forms fluoride EF3…

Q: Draw a Lewis structure for each species:(a) The cyclic silicate ion Si6O1812-(b) A cyclic…

A: Lewis’s structure - Lewis structure is the simplest representation atoms  with its valence shell…

Q: Consider the following three statements about the reactivityof an alkali metal M with oxygen gas:(i)…

A: Given statements,    (i) Based on their positions in the periodic table, the expected product is the…

Q: Predict whether each of the following oxides is acidic, basic,amphoteric, or neutral: (a) NO2, (b)…

A: Acidic oxides : oxides of non - metal are generally acidic in nature as they react with water to…

Q: Each of the chemically active Period 2 elements forms sta-ble compounds that have bonds to…

A: NOTE- As the question contains multiple subparts, We will solve the first subpart for you. To get…

Q: How do Groups 1A(1) and 2A(2) compare with respect to reaction of the metals with water?

A: Group 1A is called alkaline metal while the 2A is called alkaline earth metals. Both react in a…

Q: The elements sodium, aluminum, and chlorine are in the same period.(a) Which has the greatest…

A: Across the 3rd period, on moving left to right the size of the element decreases continuously…

Q: Would you expect an aqueous solution of manganese (VII) oxide to have a ph greater or less than 7.0?…

A: Oxidation state is the number of electrons that are either gain or lose by an atom in a chemical…

Q: Which group(s) of the periodic table is (are) described byeach of the following general…

A: (a)