-An isolated colony of bacteria is the progeny of a single bacterial cell. An isolated colony represents a pure source of an organism from which a pure culture can be started.The idea behind streaking for single bacterial colonies has to do with purity.
-When you have a single colony isolated from the rest of the colonies on the plate, it is a pure colony “grown up” from a single bacterium (that was isolated from the rest of the sample, streaked out on the plate).
because atomic number and proton &electron number is same . neutron number is solved as atomic mass minus atomic number ( N=atomic mass - atomic number)
