Question 566
What is the name of the element with atomic number 93 among the actinoids?
Question 567
What is the name of the element with atomic number 91 among the actinoids?
Question 568
What compound is primarily formed when lanthanoids burn in halogens?
Question 569
What is the name of the element with atomic number 100 among the actinoids?
Question 570
What is the name of the element with atomic number 95 among the actinoids?