tổng số hạt cơ bản trong nguyên tử M là 82 trong đó số hạt mang điện nhiều hơn số hạt không mang điện là 22.Mlà

Embryos of different species look very similar, which shows that the organisms share a ancestor.

For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i.e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?