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The boiling point of the halogen elements increase down the group from chlorine to bromine to iodine. Please explain this trend for 3 marks.

The number of electrons in the halogen atom increases as you move down the group (1st mark achieved here), causing stronger London forces to arise between the molecules of said halogen (2nd mark achieved her...
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Answered by Aaron L. • Chemistry tutor
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Describe the shape of, and bonding in, a molecule of benzene and explain why benzene does not readily undergo addition reactions.

Benzene is a planar, cyclical, hexagonal molecule, with the molecular formula C 6 H 6 . It consists of a ring of 6 carbon atoms with alternating single bonds and double bonds. The length of the bonds is equa...
Answered by • Chemistry tutor
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How to write a redox equation from half equations

There are three crucial steps in balancing redox half equations, which, when mastered, allow any two half equations, no matter how to complex, to be easily balanced. First, we balance the electrons, by deter...
JH
Answered by Jess H. • Chemistry tutor
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Give reasons for the increase in ionisation energy across a period in the table of elements.

Marks awarded for mention of outer most shells of electrons, shielding effects along side distance from nucleus of respective atoms as well as increased positive charge due to increased number of protons pre...
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Answered by Jack S. • Chemistry tutor
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Describe the stages of a heterogeneous catalyst reaction route.

The reactants adsorb to an active site on the surface of the catalyst. The active site places the reactants in an orientation that allows them to easily react. The reaction then occurs and the products are d...
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Answered by Oliver G. • Chemistry tutor
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