Match each term to its meaning

Exercise and reference answers

Matching pairs

1. Left

   Half-life

   Right

   Time for half an isotope to decay

2. Left

   Orbital

   Right

   Where an electron probably is

3. Left

   Octet rule

   Right

   Eight outer electrons is stable

4. Left

   Isotope

   Right

   Same element, different neutrons

5. Left

   Valence shell

   Right

   The outermost electron shell

Instructions

Tap a term on the left, then tap its meaning on the right.

Explanation