(2014?Anqing second model) In recent years, scientists have synthesized a stable hydrogen-aluminum compound Al2H6.The ball-and-stick model of Al2H6 is shown below, and its melting

B. 1 mol Al2H6 contains 6 mol of Al-H bonds and 1 mol of Al-Al σ bonds, and the number of Al-Al σ bonds contained: 1 mol × NA = 6.02 × 1023, so B is incorrect;

C. Al2H6 has a molar mass is: 60g/mol, so the amount of substance of 60g Al2H6 is 1mol, 1mol Al2H6 contains 2molAl, so 60g of the substance contains 2NA of Al, about 1.2×1024, so C is wrong;

D. The melting point of Al2H6 is 150 ℃, the melting point is low, so it can be judged that the substance when solid is molecular crystals, so D is wrong;

So choose A.