d and f BLOCK ELEMENTS Quiz

• There are fewer elements known today
• There are significantly more elements known today
• The number has remained roughly the same
• Only 31 elements exist in total

• Reactivity determines the block classification
• Classification makes all elements equally reactive
• Classification helps compare reactivity and link it to natural occurrence
• Reactivity is random and unrelated to classification

• s block
• p block
• f block
• g block

• To synthesize new elements
• To determine the age of elements
• To examine periodic trends in physical and chemical properties
• To calculate atomic weights precisely

• The high cost of chemicals
• The lack of laboratory space
• The sheer number of elements and compounds
• The instability of elements