In general, metals are shiny, reflecting most of the light that strikes them. They are malleable and ductile (that is, they will bend under pressure and are not brittle). They have a broad range of melting temperatures (e.g., mercury is a liquid at room temperature, gallium will melt i...
That’s because metal is a great conductor of electricity. (In fact, so is the human body, which is why you can sometimes pass the shock on to someone else.) The opposite of a conductor is an insulator, which impedes the flow of electrons from one material to another. Rubber is a gr...
The melting gallium under it would soak into the aluminum, disrupting its structure and causing it to become as soft and weak as wet paper. The burning sulfur would spill into thebromine. Bromine is liquid at roomtemperature, a property it shares with only one other element-mercury. It's ...
Semiconductor materials include – Silicon, antimony, arsenic, boron, carbon, germanium, gallium arsenide, selenium, silicon carbide, sulfur, tellurium, oxides of most metals.What is Superconductor?Superconductor is an element, inter-metallic alloy, or a compound that conducts electricity without ...
Shape-shifting robots can also be made out of organic materials, likea bio-inspired seed carrierthat buries itself into soil when cued by rain. Developed by Yao’s team at the Morphing Matter Lab, the biodegradable robotharnesses renewable energyfrom the environment when they shape shift, as a...
Silver metal crystallizes in a face centred cubic unit cell. The edge of the unit cell has a length of d = 407 pm. What is the radius in picometers of a silver atom? The body-centered cubic phase of plutonium (Pu) has a density of 16.51 g/cm^3. The atomic weight of the most...
in recent decades, materials with any perceptible value have been loaded into containers to be sold in the global marketplace. Indeed, at this point, even garbage (metal scrap, recyclable materials, and refuse headed for landfills) is worth the relatively low cost it takes to ship it an ocea...
Name the four common halogens and tell the normal phase of each. Which one is the most reactive of all elements? What is an ionic bond? What type of substance form ionic bond? Classify each element as an alkali metal, alkaline earth metal halogen, or noble gas. A) F B) Sr C) K ...
Thus while Mendeleev was able to predict the existence and the chemistry of the missing elements eka-boron, eka-aluminium, and eka-silicon (scandium, gallium, and germanium) with considerable certainty, he was much more tentative when it came to other elements. In his Faraday Lecture of 1889 ...
So, we need to use things like fans or metal pieces to take the heat away and keep the diode cool. Keeping an eye on the temperature and stopping it from getting too high is a must to make sure the diode works well and doesn't break because of the heat. High Current High current ...