: :
(1) What is the density of F?
(2) What is the density of Si?
(3) What is the density of Be?
(4) What is the density of Al?
(5) What is the density of Cl?
(6) What is the density of Li?
(7) What is the density of Cr?
(8) What is the density of Ne?
(9) What is the density of K?
(10) What is the density of C?