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Explain how electricity is conducted in a metal.

Metals have a giant metallic structure, with regular closely packed layers of positive ions in a 'sea' of delocalised electrons. What this means is that metals have a large number of positive ions, in a r...

Answered by Zeeshan K. • Chemistry tutor

5736 Views

Using Act 1 Scene 2 of the Tempest, explore how Shakespeare uses language to characterise the relationship between Prospero and Caliban.

In their initial discussion of the character, Prospero admits to his daughter Miranda – and to an extent, to the audience - that Caliban “serves in offices that profit us” and therefore he and Miranda “ca...

Answered by Olivia B. • English Literature tutor

7501 Views

Why does the atomic radius of an atom decrease as you go across a period?

The atomic radius is often defined as being one half the distance between the two nuclei in a homonucleur diatomic molecule. In general, there is a decrease in atomic radius as you go across a period. Thi...

Answered by Louise E. • Chemistry tutor

1070 Views

There are two isotopes of element A. Information about the two isotopes is shown in Table 4. Table 4 Mass number of the isotope 6 7 Percentage abundance 92.5 7.5 Use the information in Table 4 to calculate the relative atomic mass of element A. Give your

92.5/100 x 6 = 5.557.5/100 x 7= 0.5255.55 + 0.525 = 6.075= 6.08 (2dp)

Answered by Natasha C. • Chemistry tutor

5304 Views

Describe the Ethnic Density Effect relating to Psychosis. What did Velling et al (2007) find relating to this, and what does it suggest about the role of socio-developmental factors in psychosis?

Ethnic minorities living within an area with few people from the same ethnic background is associated with increased psychosis incidence.Within Velling et al's (2007) study they found that immigrant group...

Answered by Matthew V. • Psychology tutor

1004 Views