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[He] 2s2 2p4There are 4 potential shells of electrons for the elements in the periodic table, denoted by the first number, 1 to 4.Within each shell there is a matching number of subshells; in shell 1 ther...

1. Improvements in transport infrastructure and operations: Resulted in quick, reliable and cheap methods to allow production to be seperated around the world. 2. Improvements in IT and communication: ...

1. Increase in incomes abroad: Increased incomes abroad increases their MPM. This increases demand for UK exports and thus demadn for the pound shifts. 2. A relative rise in UK interest rates: As UK I...

When it rains, nitrates added to the soil by fertilisers can run off into water courses, such as lakes. This is called leaching. The high level of nitrates in the water accelerates the growth of plants at...

3.5 g of sodium500 cm³ of water is 0.5 dm^33.5 / 0.5 = 7 g dm^-3