5. Which of the following best explains the Periodic Law and its application to the Elements?
A. Elements form groups because they are formed in similar circumstances and therefore behave similarly in nature
B. The Periodic Law is consequence of law of multiple proportion discovered by John Dalton in 1803
C. Elements from the same group have similar physical and chemical properties due to the fact they similar electronic structures
D. The periodic law is a simple coincidence of the names given to the elements, i.e. Halogens, Alkali Metals, Noble gases, etc. It has no fundamental bearing on the chemical or physical properties of the elements
Answer: C. Elements from the same group have similar physical and chemical properties due to the fact they similar electronic structures
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