Question

Both calcium and magnesium are heavier than water but still float over it. Explain

Answer 1

Answer:Calcium floats in water as bubbles of hydrogen stick to its surface. hydrogen gas bubbles form on its surface, and the coil of magnesium ribbon usually floats to the surface. However, the reaction is short-lived because the magnesium hydroxide formed is almost insoluble in water and forms a barrier on the magnesium preventing further reaction