The Age of Discovery of Elements Essay
In 1863, John Newlands, produced something that he called the 'Law of Octaves'. He used this to produce his own version of the periodic table, but Newlands came across some problems. "After about 20 elements his table became ragged,"*2 Newlands had left no gaps for undiscovered elements and even …show more content…
He called it Gallium, this new element had very similar properties to Mendeleev's predicted element 'eka-aluminium'; this therefore supported his idea of the Periodic table hugely.
Table 1, comparing Mendeleev's prediction with the properties of element 31, gallium. *7
Gallium has some very unusual properties, some which suggest that it is a metal and some that imply it is a non-metal.
Its physical properties, a melting point of 29.78Â°C (which is almost UK room temperature) making it a liquid metal along with Mercury and Caesium. It also has an extremely high boiling point, 2403Â°C; together with its low boiling point gallium has the 'widest liquid range' of any element discovered so far. Gallium is also denser as a liquid than as a solid, as is water.
Word count: 190
Gallium's chemical properties include, dissolving in acid and alkalis, evolving hydrogen. Aluminium and