Why are alkali metals more reactive than alkaline-earth metals? Why is fluorine highly reactive? Explain why +2 is the most common oxidation state for the transition metals. Why are the halogens so important? Why don't molecular compounds conduct electricity, but ionic compounds do?
Alkali metals are the elements of group 1 of the periodic table that when reacts with water, produces an alkaline solution, along with the release of hydrogen gas. Alkali metals include lithium, sodium, potassium, rubidium, and cesium.
When quartz is fractured, the newly generated and highly reactive surface radicals may react with environmental water vapor and evolve towards more stable surface silanol moieties (i.e., –SiOH) [6]. In this respect, the nearly free silanols (NFS), which are clustered at a well-defined ...
Elements may be classified as metals, nonmetals or metalloids. Metals are the elements located at the left portion of the periodic table while the nonmetals are on the right side. The metals and nonmetals are separated by the metalloids. Answer and E...
Nanoparticles are small, ranging from 1 to 100 nm, which causes differences in features compared to bulk metals. The small size of nanoparticles is more advantageous as it has an increased surface area-to-volume ratio, which directly increases interaction with other molecules [52]. Thus, the ...
The substances identified in the liquids and aerosols of electronic cigarette devices (ENDSs) include nicotine, propylene glycol (PG), glycerol, vegetable glycerine (or glycerol) (VG), tobacco-specific nitrosamines, metals, products of degradation products, volatile organic compounds, phenolic compounds...
These results highlight a potentially important role for Mn(II)-oxidizing bacteria in drinking water systems, where biogenic Mn oxides may affect water quality in terms of aesthetic appearance, speciation of metals and oxidation of organic and inorganic compounds. Deciphering the ecology of these ...
Noble metal electrodes are typically based on a palladium-silver alloy, and may also be referred to as precious metal electrodes (PME), since noble metals (those that are relatively nonreactive, particularly with oxygen) also tend to be expensive. Since these electrode materials are used because...
Copper and iron are reactive metals that increase oxidative stress in neurodegenerative diseases such as HD [60,61]. Another source of excessive free radicals is an overload of misfolded proteins in the endoplasmic reticulum (ER) [62]. mHtt becomes cleaved by proteases (Figure 1), which ...
The nanoparticles also increased the toxicity of heavy metals, depending on the type of toxic effect observed and the concentration of the particular metals. Free AgNPs were able to significantly inhibit the efflux activity only at higher concentrations (3.5 µg/mL vs. 0.35 µg/mL) after 24...