Who made the first scientific discovery of an element?

The graph above shows how the price of cell phones varies with the demand quantity. the equilibrium price for cell phones is where both supply and demand quantities equal $100, 5,000 5,000, $100

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

What is the mass of phosphorous in a 51-kg person