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Name two secondary hazards of earthquakes (4)

Firstly, the aftermath of an earthquake can create an environment where disease spreads due to the close proximity of those gathered after losing homes (creates densely populated communities, especially in l...
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Answered by Joshua A. • Geography tutor
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Does Mg or Al have the higher first ionisation energy? Explain your answer.

Al has the higher first ionisation energy. Mg electronic configuration is [Ne]3s 2 whereas Al configuration is [Ne]3s 2 3p 1 . To remove the electron from Al, it has to be removed from the 3p orbital, as opp...
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Answered by Kathryn R. • Chemistry tutor
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Explain how crude oil gets separated into its components

Crude oil is a mixture of hydrocarbons with varying length carbon chains. The main method used to separate these is fractional distillation. The crude oil is heated, then placed inside a fractionating column...
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Answered by Kathryn R. • Chemistry tutor
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Express the number 252 in terms of its prime factors

Start with the number 252 and split into factors, for example it is even therefore is divisible by 2. Work out the other number and then continue finding factors of each number until you are left with prime ...
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Answered by Kathryn R. • Maths tutor
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which element has a lower first ionisation energy, Magnesium or Aluminium?

Ionisation energy is the energy required to remove one electron from an isolated gaseous atom (in its ground state). This generates a cation (ion with a positive charge). Both Mg and Al are in period three, ...
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Answered by Hajra A. • Chemistry tutor
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