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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 ...
SB
Answered by Sam B. • Chemistry tutor
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Why do transition d-metal complexes show color?

Several d-metal complexes show colour. This is because their d-orbitals are not degerate in energy levels. Instead the d-orbitals split, some having higher energy than average and some lower than average. Th...
JN
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What is the difference between Ionic and Covalant bonding?

Bonding is when two atoms join together; this happens through movements of electrons to help create a full outer shell of electrons. Ionic bonding is when this takes place between a metal and non metal atom....
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Answered by Aishah I. • 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...
LC
Answered by Lorenzo C. • Chemistry tutor
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Calculate the enthalpy of formation of water.Is the reaction an exothermic or endothermic reaction?

The reaction is as follows: 2H 2 + O 2 -> 2H 2 O This means that for every 2 molecules of Hydrogen gas, one molecule of Oxygen is needed to make 2 molecules of water To calculate the enthalpy of this reac...
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Answered by Sarah L. • Chemistry tutor
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