Add or subtract the electron

Exercise and reference answers

Questions

1. Answer

   Add one

   Question

   A negative charge on the ion

   Choices

   1. Add one
   2. Subtract one

2. Answer

   Subtract one

   Question

   A positive charge on the ion

   Choices

   1. Subtract one
   2. Add one

3. Answer

   Add two

   Question

   A two minus anion

   Choices

   1. Add two
   2. Subtract two

4. Answer

   Subtract two

   Question

   A two plus cation

   Choices

   1. Subtract two
   2. Add two

5. Answer

   Change nothing

   Question

   A neutral molecule

   Choices

   1. Change nothing
   2. Add one

6. Answer

   Add three

   Question

   A three minus anion

   Choices

   1. Add three
   2. Subtract three

Instructions

Pick the right one each time. Too many wrong picks and the tower falls.

Explanation