Select the two isotopes of nitrogen-15. carbon-13 15N 0-15 F²- 14N Ophosphorus-15 N-16 0+ 150 Incorrect

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A: #18) Rxn : 4H2 +  CO2 -->  CH4 + 2H2O

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Q: (a) (c) (a) (c) m Br om NBS AIBN, A CHE Na NH3, -35°C 201 (b) (d) (b) (d) Br Br CHE 01 CH

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Q: Differentiate between a unit cell and a crystal.

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Q: Account for the acidity of cations in aqueous solutions (charge/size or charge density)

A: The ratio of charge and size of an ion is known as charge density.  Charge density = charge / size

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.