Tag: science & technology

Technetium (atomic number 43) was the first element to be produced artificially in 1937 by Carlo Perrier and Emilio Segrè. All naturally occurring technetium on Earth comes from spontaneous fission of uranium-238 or from cosmic ray interactions. It was named from the Greek 'technetos' meaning 'artificial.' Molybdenum (42) and Protactinium (91) occur naturally, while Meitnerium (109) was synthesized much later in 1982.

Chandrayaan-1, India's first lunar mission, was successfully launched on October 22, 2008. The mission was launched by ISRO using a PSLV-XL rocket from the Satish Dhawan Space Centre in Sriharikota. This marked a significant milestone in India's space exploration program.

Chandrayaan-1 was indeed India's first mission to the moon. Before this, India had not sent any spacecraft to the moon. The statement is factually correct as Chandrayaan-1 marked India's entry into lunar exploration in 2008.

M3 stands for Moon Mineralogy Mapper, which was one of the key scientific instruments on Chandrayaan-1. It was a NASA instrument that helped map the mineral composition of the lunar surface and contributed to the discovery of water molecules on the moon.

The United States did support Chandrayaan-1 by providing several key scientific instruments including M3 (Moon Mineralogy Mapper) and Mini-SAR. This collaboration between NASA and ISRO made the mission more scientifically productive and is an example of international cooperation in space exploration.

SIMS stands for 'Secondary Ion Mass Spectrometer', which is a scientific instrument used for analyzing the composition of solid surfaces and thin films by sputtering the surface with a focused primary ion beam and collecting and analyzing ejected secondary ions. This type of instrument was indeed used in lunar research.

YAHOO stands for 'Yet Another Hierarchically Organized Oracle', reflecting its origins as a directory of websites organized hierarchically. The expansion emphasizes that it was another in a series of such systems (the 'Yet Another' pattern common in tech naming). Option B uses 'Organised' (British spelling) which is less common for this acronym.