-
condensation on
solid argon.
ArCrO absorbs at 846.3 cm−1,
ArMn
O at 833.1,
ArFe
O at 872.8,
ArCo
O at 846.2, Ar58Ni
O at 825.7 and Ar60Ni
O at 822.8 cm−1. All these...
- H3PO2 + 2 Cr2O3 → 4
CrO + H3PO4 It is
readily oxidized by the atmosphere.
CrO is basic,
while CrO3 is acidic, and Cr2O3 is amphoteric.
CrO occurs in the spectra...
- T
Coronae Borealis (T
CrB),
nicknamed the
Blaze Star, is a
binary star and a
recurrent nova
about 3,000 light-years (920 pc) away in the constellation...
-
Chromium is a
chemical element; it has
symbol Cr and
atomic number 24. It is the
first element in
group 6. It is a steely-grey, lustrous, hard, and brittle...
- alpha-elements (Ne, Mg, Si, S,
Ar, Ca, and Ti)
while Type Ia
supernovae mainly produce elements of the iron peak (Ti, V,
Cr, Mn, Fe, Co, and Ni). Sufficiently...
- one
electron to the 4s s**** ([
Ar] 4s1), and
calcium then
completes it ([
Ar] 4s2). However,
starting from
scandium ([
Ar] 3d1 4s2) the 3d subs**** becomes...
-
Oxygen is a
chemical element; it has symbol
O and
atomic number 8. It is a
member of the
chalcogen group in the
periodic table, a
highly reactive nonmetal...
- In mathematics, a
CR manifold, or Cauchy–Riemann manifold, is a
differentiable manifold together with a
geometric structure modeled on that of a real hypersurface...
-
Collinder 228 (
Cr 228)
Collinder 232 (
Cr 232)
Collinder 234 (
Cr 234)
Trumpler 14 (Tr 14,
Cr 230)
Trumpler 15 (Tr 15,
Cr 231)
Trumpler 16 (Tr 16,
Cr 233) Overview...
- odd-
cr(G).
These parameters are not unrelated. One has odd-
cr(G) ≤ pair-
cr(G) ≤
cr(G) for
every graph G. It is
known that
cr(G) ≤ 2(odd-
cr(G))2 and
O (...
