For the following chemical reaction, how many moles of hydrogen, H2, will be produced from 15.4 g of aluminum, Al? 2\

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory