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It is one of multiple publications by the company for Plus 7 dní, Šarm, and Báječná žena. [1] On 28 March 2008, Plus jeden deň protested against a law which it said would curb freedom of the press by publishing a paper with its front page blank except for a summary of criticisms of the proposed regulation. [3]
Lucas numbers have L 1 = 1, L 2 = 3, and L n = L n−1 + L n−2. Primefree sequences use the Fibonacci recursion with other starting points to generate sequences in which all numbers are composite. Letting a number be a linear function (other than the sum) of the 2 preceding numbers. The Pell numbers have P n = 2P n−1 + P n−2.
H 2 Se adopts a bent structure with a H−Se−H bond angle of 91° [citation needed]. Consistent with this structure, three IR-active vibrational bands are observed: 2358, 2345, and 1034 cm −1. [6] The properties of H 2 S and H 2 Se are similar, although the selenide is more acidic with pK a = 3.89 and the second pK a = 11, [6] or 15.05 ± 0 ...
NaPb 3, NaPb, Na 9 Pb 4, Na 5 Pb 2, and Na 15 Pb 4 are some of the known sodium-lead alloys. Sodium also forms alloys with gold (NaAu 2) and silver (NaAg 2). Group 12 metals (zinc, cadmium and mercury) are known to make alloys with sodium. NaZn 13 and NaCd 2 are alloys of zinc and cadmium. Sodium and mercury form NaHg, NaHg 4, NaHg 2, Na 3 Hg 2 ...
Selenous acid (or selenious acid) is the chemical compound with the formula H 2 SeO 3. Structurally, it is more accurately described by O=Se(OH) 2. It is the principal oxoacid of selenium; the other being selenic acid.
The following is a list of best-selling albums by country. Depends on the measurement, record sales of albums are taken by estimations or certifications. Note that some of the data are incomplete due to a lack of available published data from a number of territories, unlike the United Kingdom and the United States with recognized national measurement firms and certifying bodies such as ...
Sodium–hydrogen antiporter. The sodium–hydrogen antiporter or sodium–proton exchanger ( Na+/H+ exchanger or NHX) is a membrane protein that transports Na + into the cell, and H + out of the cell ( antiport ). Na + /H + antiporter 1. Identifiers. Symbol.
Hydrogen (1 H) has three naturally occurring isotopes, sometimes denoted 1 H, 2 H, and 3 H. 1 H and 2 H are stable, while 3 H has a half-life of 12.32(2) years. [3] [nb 1] Heavier isotopes also exist, all of which are synthetic and have a half-life of less than one zeptosecond (10 −21 s). [4] [5] Of these, 5 H is the least stable, while 7 H ...