Modern Periodic Table Flashcards
A period
A period is a horizontal row of elements in the periodic table. Elements show trends in properties across a period.
Periodicity
Periodicity is a regular periodic variation of properties of elements with atomic number and position in the periodic table.
Colour of chlorine in water?in cyclohexane?and colour of chloride ion?
In water and in cyclohexane chlorine is pale-green. A chlorine ion is colourless.
What is the colour of bromine in water?in cyclohexane?and as a bromine ion?
In both water and cyclohexane bromine is orange. Bromine ion is colourless.
What colour is iodine in water?in cyclohexane?as an ion?
Iodine is brown in water and violet in cyclohexane and is colourless as an ion.
A displacement reaction.
A displacement reaction is a reaction in which a more-reactive element displaces a less-reactive element from an aqueous solution of the latters ions.
What is disproportionation?
Disproportionation is the oxidation and reduction of the same element in a redox reaction.
A precipitation reaction
A precipitation reaction is the formation of a solid from a solution during a chemical reaction. Precipitates are often formed when to aqueous solutions are mixed together.
