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Trend in Melting point going down group 1 elements

Going down group 1 the period number increases. This means the number of shells increases, leading to a decrease in electrostatic attraction between the positive nucleus and outer most electrons. This weaker...
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Answered by Amin U. • Chemistry tutor
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Describe how crude oil is separated by fractional distillation.

Crude oil is composed of hydrocarbons of different lengths. In a fractional distillation chamber, the crude oil is heated and cooled to different temperatures. The shorter chain hydrocarbons will boil at a l...
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Answered by Sophie P. • Chemistry tutor
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Whats the difference between covalent and ionic bonding?

Covalent bonding involves the sharing of pairs of electrons . The atoms involved are non-metals such as carbon, oxygen and hydrogen. When these atoms join together they form molecules . Ionic bonding involve...
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Answered by Harriet M. • Chemistry tutor
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What transformations occur when turning limestone to quicklime then to slaked lime?

Calcium carbonate (limestone) is decomposed in order to form calcium oxide (quicklime) and carbon dioxide. The quicklime is then treated with water in order to give calcium hydroxide (slaked lime). CaCO 3 -&...
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Answered by Sabina F. • Chemistry tutor
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What is the difference between a reversible reactions which occurs in a closed system and an open system?

An Open System is one in which one or more of the reactants or products are able to escape from the container. A Closed System is one in which neither the reactants or the products can escape from the contai...
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Answered by Kawthar H. • Chemistry tutor
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