Gh The Sequence Of The First Three Elements In The Periodic Table Is Hydrogen Hellum And Then Lithium Explain Why The 1 (28.61 KiB) Viewed 58 times
Gh The Sequence Of The First Three Elements In The Periodic Table Is Hydrogen Hellum And Then Lithium Explain Why The 2 (38.3 KiB) Viewed 58 times
GH) The sequence of the first three elements in the Periodic Table is hydrogen. hellum and then lithium Explain why the first ionisation energy of hydrogen is less than that of helium but greater than that of lithium. 3 Turn over (d) Hydrogen can be placed in several different positions in periodic tables One is immediately above lithium in Group 1. Another is in the centre of the first row, as shown in the Periodic Table on the back cover. Criticise the position of hydrogen immediately above lithium by giving one reason in favour and two against
3 The compounds hydrogen fluoride, water and methane, all have simple molecular structures, but they have significantly different boiling temperatures. Discuss the reasons for the differences in the boiling temperatures of the three compounds, using the data in the table and the Pauling electronegativity values in the book Compound Boiling temperature 1°C -161.5 Number of electrons 10 CH HO 100.0 10 HF 19.5 10 (6)
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