What the name for the color of the powder left behind when a mineral is rubbed across a hard surface? a. luster b. streak c. tenacity d. fracture

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

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.