Question

fill in the missing words particles with an odd number of valence electrons are called. those particles are extremely because an unpaired electron “drives” the particle to chemically react with another molecule or another radical to pair up with another electron and achieve (an) (of) electrons (for h atom it is only electrons).

Explanation:

Particles with an odd - number of valence electrons are known as free radicals. Free radicals are highly reactive due to the presence of an unpaired electron which makes them seek to pair up with another electron to achieve an octet (for most atoms, except hydrogen which aims for a duet).

Answer:

1. free radicals
2. reactive
3. octet
4. duet