The crust is the outside layer and also the thinnest.
Answer:
207g
Explanation:
207.2 to be more specific
Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. Solutions of HF are colourless, acidic and highly corrosive. It is used to make most fluorine-containing compounds; examples include the commonly used pharmaceutical antidepressant medication fluoxetine (Prozac) and the material PTFE (Teflon).
Answer:
the valence electrons of atoms in a pure metal can be modeled as a sea of electrons
