Thus by 1803 there were two known rare earth elements, yttrium and cerium, although it took another 30 years for researchers to determine that other elements were contained in the two ores ceria and yttria (the similarity of the rare earth metals' chemical properties made their separation difficult).
For instance, students who pursue a Ph.D. in psychology usually take from five to seven years depending upon required coursework as well as internship and supervised residency requirements.
While opting for Psychology as your prospective career option just a Bachelorâs degree wonât be sufficient. With Bachelorâs degree one is required to be a major in the psychology subject to say the least. How long does it take to attain a Bachelorâs degree program? This bachelorâs degree program takes about 4 years to complete. Once you are done with the Bachelorâs degree program the next step is to opt for a Doctoral Degree program also known as a Masterâs Degree program in Psychology.