The elements sodium and chlorine react together to form the compound sodium chloride, which has a giant ionic lattice structure. a What type of structure do the elements
(i) sodium and
(ii) chlorine have?

b Draw a diagram to represent how the ions are arranged in the crystal lattice of sodium chloride.

c Explain how the ions are held together in this crystal lattice.

d Draw diagrams to show how the electrons are arranged in a sodium ion and a chloride ion.
(The proton numbers of sodium and chlorine are 11 and 17, respectively.)

e Make a table showing the properties of the three substances sodium, chlorine and sodium chloride. Include in your table:
(i) the physical state at room temperature
(ii) solubility in (or reaction with) water
(iii) colour
(iv) electrical conductivity.

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet