Ellele Me
bacterium A
Covered with
bacterium B
Placedo
covered with
bacterium C
each pla
Clear zone
bacteria
Incubation at 37°C for 48 hours
Bacterial
growth
Result
[Adapted from 2004 HSC NSW: Section 1 - Part B Q27)
The plates were incubated at 37°C for 48 hours. The diagram of plates 1, 2 and 3
in the bottom row show the results of the investigation.
2.1 Formulate a hypothesis for this investigation.​

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.

c. 4.54 x 10–12 j happens to be correct