19. The atomic number is the same as protons and electrons unless it have a - or a + charge the electrons are going to change
C I think is the right answer
The answer is C, hydrogen gas. This is because in single replacement reactions, the single element (here Magnesium) replaces whichever element in the compound it corresponds to. Because Mg loses electrons since it’s a metal, it will replace the element which also loses electrons, which is Hydrogen here. So when they switch places, MgCl2 and H2 are made— and H2 is the hydrogen gas.
Porque la temperatura de la agua es neutral
electron configuration is the arrangement of electrons in an atom, molecule, or other physical structure (e.g., a crystal).
