Explain why the element nickel has a high melting point
Nickel is a metal and therefore it contains positive ions, called protons, which are surrounded by a sea of delocalised electrons, which are negative ions. There is a strong force of attraction between these positive and negative ions, and this requires a large amount of energy to break. This means that a large amount of heat energy needs to be applied to break the bonds, resulting in a high melting point.
JD
Related Chemistry A Level answers
All answers ▸"Sulfur Dioxide can be represented as a sulfur atom with double bonds to each of two oxygen atoms, explain the shape of this molecule and predict the bond angle".
Define the term relative isotopic mass. (2 Marks)
What chemical test can be used to differentiate between alkenes and alkanes. Describe and explain the results.
State the reagents and conditions for the formation of an aldehyde, starting from a primary-alcohol.