Yttrium3Y3988.9059 4.472g/cm1522.

-238 .

,. (),.

Understanding the Context

().

[Xe]5d6s+3+2La.

(Rare earth) .

rare earth elementB213957~7117RE .

Key Insights

15LnShPNPShnYuGTDHurDi.

15 .

LaCe(Pr)(Nd)(Pm)(Sm)(Eu)(Gd)(Tb)(Dy)(Ho)(Er)(Tm)(Yb)(Lu)15.