The answer for this question is: Atoms
Answer:
B. K+cation
Explanation:
Not all that sure but hope it will help.
Answer:
The emission spectrum is formed when the electrons of a particular atom absorb energy and are excited (in this case by heating), reaching higher energy levels.
You can see it for example with an experiment where we light alcohol mixed with banana chips (it has potassium). The burning alcohol emits heat that makes potassium atoms excite and these in turn emit something red, orange light. If we add for example boric acid you see a green light.
Explanation:
Heat is been absorb allowing particles of the liquid to overcome the vapor pressure
