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Why does ionisation energy of elements generally decrease as you move down a group in the periodic table?

Ionisation energy is the energy required to remove the most loosely bound (furthest out) electron from an atom, in the gaseous state. As you move down a group in the periodic table, the number of protons in ...
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Answered by Sam B. • Chemistry tutor
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Although carbon dioxide is a linear molecule it is still a greenhouse gas. Explain why that is.

A greenhouse gas is one which absorbs infrared radiation from the Earth and re-radiates it, increasing the surface temperature of the Earth. Normally these molecules are non-symmetrical such as triflurometan...
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Answered by Lorenzo C. • Chemistry tutor
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Describe the Structure and Bonding of Benzene

Benzene has the chemical formula C6H6 where each Carbon atom is bonded to two other Carbon atoms and a single Hydrogen atom. The 4th bond pair of electrons from each Carbon atom is delocalised, creating a de...
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Answered by Ben L. • Chemistry tutor
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What is a ligand?

A species with one or more valence electron pairs that forms co-ordinate bonds with a metal ion.
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Answered by Umamah Y. • Chemistry tutor
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Providing reasoning, what is the trend in the atomic radius of row 3 elements across the periodic table?

Decreasing atomic radius across the periodic table. - greater number of protons in the nucleus resulting in a greater nuclear charge. - little/no change in shielding. - electrons added to same shell. - overa...
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Answered by Jenny S. • Chemistry tutor
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