The use of performance enhancing drugs has resulted in drug ...

[Kthamas]

The use of performance enhancing drugs has resulted in drug screening at major sports events, such as the Olympics.
 
  Indicate whether the statement is true or false

Question 2

The lanthanide contraction is responsible for the fact that ________.
 
  A) Zr and Y have about the same radius
  B) Zr and Nb have similar oxidation states
  C) Zr and Hf have about the same radius
  D) Zr and Zn have similar oxidation states
  E) Zr and Hf have the same oxidation states

[covalentbond]

Answer to Question 1

TRUE

Answer to Question 2

C

[Kthamas]

Wow, this really help

[jackie]

Thanks for the timely response, appreciate it