Unit 3 CER - Light Emission Scientific Background
Giovanni's Chemistry teacher has been talking about light emission and auroras in class. Giovanni remembers
walking past a pizza store near his house and remembers the bright red Neon sign blinking the words "OPEN".
OPEN
Writing Task
• Can you help Giovanni construct an explanation of why light emission happens based on what you
have learnt in class.
Make sure you cite both the documents as evidence in your CER.
Document 1:
photon
ground state
excited state
Document 2:
photon
excited state
ground state

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

hope this contact me for more questions if you'd like: )

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.