Question 391
What are iron and steels primarily used for according to the text?
Question 392
Which industry uses MnO2 according to the text?
Question 393
Why is the chemistry of elements succeeding actinoids less known?
Question 394
Which element is mentioned as a well-known lanthanoid exhibiting +4 oxidation state?
Question 395
Which contraction has more extended effects on the properties of succeeding elements currently?