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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 wea...

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 ...

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 molecu...