How many valence electrons does magnesium have?

Magnesium is a chemical element in the periodic table that has the symbol Mg and atomic number 12. The free element of magnesium is a metallic silver white that is both ductile and malleable. It was first isolated by Sir Humphry Davey in England by passing an electric current through molten Magnesium Chloride. It is … Read more

How_does_windows_know_which_program_to_use_to_open_a_file_when_you?

In Windows, each file extension has an associated program that is used to open it. If you double click on a file and nothing happens, then the program that’s called when a file with that extension is opened is not installed or configured correctly. The main configuration files involved in setting these associations are:2 1. … Read more