The nightmare of the reactivity series. He created a mnemonic: "Please Stop Calling Me A Careless Zebra Instead Try Learning How Copper Gets Silver." (Potassium, Sodium, Calcium, Magnesium, Aluminum, Carbon, Zinc, Iron, Tin, Lead, Hydrogen, Copper, Silver). He wrote it on the margin of page 24, surrounded by tiny flames representing displacement reactions.
. He could almost see the electrons dancing around the nucleus, like the frantic commuters at New Delhi Station. He muttered to himself, "The atomic number is the number of protons... don't mix it up with mass number, Arjun. Not again." Next came the Periodic Table chemistry notes ssc