All atoms of the same element have the same what?

Asolution has a ca2+ concentration of 0.049 m and an f- concentration is 0.147 m at equilibrium. the value of ksp for caf2 at 25°c is 4.0 x 10-11. will this solution form a precipitate? yes no

What is the mass of 0.46 mil of mgcl2

Asolid that forms and separates from a liquid mixture is called