Fill the gaps on the d-block

Exercise and reference answers

Missing parts

1. Answer

   12

   Choices

   1. 12
   2. 18
   3. 10

2. Answer

   transition

   Choices

   1. transition
   2. alkaline
   3. noble

3. Answer

   lanthanoids

   Choices

   1. lanthanoids
   2. actinoids
   3. halogens

4. Answer

   contraction

   Choices

   1. contraction
   2. expansion
   3. inversion

Complete the statement

The d-block covers groups 3 to {0}. Its elements are the {1} metals. The 4f series holds the {2}. Filling 4f early gives the lanthanoid {3}.

Instructions

Tap a word to drop it into the empty slot.

Explanation