Top answers

Explain why the first ionisation energy of Al is less than that of Mg?

The outer electron on aluminium is removed from the 3p sub-level, whereas the outer electron on magnesium is removed from the 3s sub-level.The 3p sub-level is higher in energy than the 3s sub-level.Aluminium...
Answered by • Chemistry tutor
29843 Views

Describe how you would use a biochemical test to show that a solution contained a protein (2 marks)

Biuret testThe solution colour changes to: Lilac / purple / mauve / violet(specific colour required, reject blue or pink)
Answered by • Biology tutor
8561 Views

Name two enzymes involved in DNA replication (2 marks)

DNA helicase (1 marks)DNA polymerase (1 marks)
Answered by • Biology tutor
3410 Views

Which of the following was of greater importance as a reason for overseas exploration, 1445-1570? (i) Religion (ii) Technological change

Religion was undoubtedly a vital motivating factor for overseas exploration in Spain and Portugal. Within the Reconquista, ending for Portugal with the capture of Farzo in 1249 and for Spain with the conques...
AC
Answered by Abigail C. • History tutor
2219 Views

Evaluate the dopamine hypothesis explanation for Schizophrenia (8)

This explanation looks at how dopamine deficiency can explain Sz. Dopamine regulates mood and attention. The dopamine hypothesis states that an access number of dopamine synapses results in Sz. This overacti...
HK
Answered by Haroon K. • Psychology tutor
7100 Views