Answer:
The molecular formula of chalk is caco3.
chalk has 3 elements.
it has one atom of calcium, one atom of carbon and three atom of oxgyen
Answer: Water molecules make hydrogen bonds
Explanation: The hydrogen bonds in water exclude the nonpolar tails of phospholipids, forcing the molecules into a bilayer
Radium, which has an atomic number of 88. The Alkaline earth metals are in the second column of the Periodic Table. Hope this helps!