Select the strongest bond in the following group

In which of these substances are the atoms held together by metallic bonding?

Cold packs, whose temperature are lowered when ammonium nitrate dissolved in water, are carried by athletic trainers when transporting ice is not possible. Which of the following is true of the reaction (dissolution of ammonium nitrate in water)?

The diameter of a chloride ion is 362 pm, and the diameter of a potassium ion is 276 pm. What is the distance between the nuclei of adjacent chloride and potassium ions in solid KCl?

The lattice energy of solid MgCl2 is the energy change for which one of the following processes?

When two atoms form a covalently-bonded diatomic molecule, the distance between the nuclei at which the potential energy is at a minimum is called

Which of the following elements will form a cation with a +2 charge?

In a redox reaction, electrons are transferred 

An important step in the synthesis of nitric acid is the conversion of ammonia to nitric oxide.  4NH3 (g) + 5O2 (g) 4NO (g) + 6H2O (g) Calculate Horxn for this reaction. Hof = -45.9 kJ/mol; Hof = 90.3 kJ/mol; Hof = -241.8 kJ/mol; 

A patient with a Klatskin tumor would show which of the following?