Tag: science & technology

Antimony's symbol is Sb, derived from its Latin name 'Stibium'. It has atomic number 51. Option A is Astatine, B is Arsenic, and C is Tin. Many element symbols come from their Latin or Greek names rather than their English names.

Ununhexium (element 116, now named Livermorium with symbol Lv) had the temporary systematic name Uuh based on 'un-un-hex' (1-1-6). These systematic names follow a pattern: un=1, bi=2, tri=3, quad=4, pent=5, hex=6, sept=7, oct=8, enn=9. Element 116 was officially named Livermorium in 2012.

Gravitational microlensing occurs when a black hole passes between Earth and a distant star, causing the star's light to bend and brighten temporarily. This effect allows detection of isolated black holes that aren't actively accreting matter. Black holes themselves don't emit visible light, making direct observation impossible, but their gravitational effects betray their presence.

Ununtrium (element 113, now named Nihonium with symbol Nh) had the temporary systematic name Uut from 'un-un-tri' (1-1-3). The systematic naming uses Latin roots: un=1, bi=2, tri=3. Element 113 was officially named Nihonium in 2016 after its discovery at RIKEN in Japan.

Tungsten's symbol is W, derived from its German name 'Wolfram'. It has atomic number 74 and is known for having the highest melting point of all pure metals. Option A is Ytterbium, B is Yttrium, and D is Zinc. Many heavy metals have symbols based on their German or Latin names rather than English.

Yb is the chemical symbol for Ytterbium, a lanthanide element with atomic number 70. Y is Yttrium, V is Vanadium, and Xe is Xenon.

Te is the chemical symbol for Tellurium, a metalloid element with atomic number 52. Ti is Titanium, Tl is Thallium, and Tm is Thulium.

Subrahmanyan Chandrasekhar calculated the Chandrasekhar limit (~1.4 solar masses) - the maximum mass for a white dwarf star before gravitational collapse into a neutron star or black hole. Schrodinger, Feynman, and Einstein made different contributions to physics.

Ru is the chemical symbol for Ruthenium, a transition metal with atomic number 44. Rn is Radon, Rh is Rhodium, and Rg is Roentgenium.

Rb is the chemical symbol for Rubidium, an alkali metal with atomic number 37. Re is Rhenium, Ra is Radium, and Rf is Rutherfordium.