Which of the following non - metal elements is a halogen? A. Sulfur B. Fluorine C. Silicon D. Phosphorus 相关知识点: 试题来源: 解析 B。解析:Fluorine(氟)属于卤素,是一种非金属元素。Sulfur(硫)、Silicon(硅)和Phosphorus(磷)都不属于卤素。
Which of these three elements has the most mass? (a) Hydrogen. (b) Iron. (c) Uranium. (d) Same in each. Comparing Atomic Masses of Elements: The atomic mass of an element is different according to the different isotopes of the...
Which is the most reactive element in the period table? Which of the elements in the following periodic table are lanthanides? In period 2 of the periodic table, which group contains the element with the highest first ionization energy? a. alkali metals b. alk...
HalogenOxidantLatimer diagramEnthalpy of formationRedox potentialAlthough it is generally accepted that fluorine is the strongest oxidant among the halogens and so among all of the elements, it has not been explained in the literature why this is the case. In this paper, we ask whether this "...
When freshly cut, lead is silvery with a hint of blue; it tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is a relatively un...
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Which atom is it the easiest to take an electron from? The ionization energy of the elements increases as one moves up a given group because the electrons are held in lower-energy orbitals, closer to the nucleus and thus more tightly bound (harder to remove). Based on these two principles...
Nitric acid is a major industrial chemical, which is primarily used for nitrate fertilizer production. Hydroxylamine is a starting material for the production of polyamide synthetics.Chlorine, bromine, and iodine halogen nitrogen compounds include halogensubstituted derivatives of ammonia, hydrazine, and ...
Silver halide photographic elements which are capable of high-contrast development and are especially useful in the field of graphic arts comprise surface latent image forming high-chloride silver halide grains and have incorporated therein a hydrazine compound which functions as a nucleator, an amino ...
The use is described of boron compounds chosen from the group consisting of boron carbide and metal borides mixed with non-reinforcing fillers, with the proviso that at least 75% by weight of the non-