1. 以钙的英文calcium的每个字母的开头写关于钙的一些性质
C: chemical element with the symbol Ca
A: atomic number is 20
L: lightest of the alkaline earth metals
C: calcium salts are not soluble in water
I: its density is 1.55 g/cm3
U: usually reacts with water
M: most abundant metal by mass in many animals