Topic search for element - Topodia makes research easy.

philip kraft , organic chemistry , organic synthesis , organic division , program

Organic Chemistry is the branch of chemistry dealing with the compounds of carbon.

high performance hvac , rotational particle separator , air conditioning , hvac equipment , hvac system

This category contains sites that discuss the technical aspects of HVAC (heating, ventilation and air conditioning systems) as they are applied to residential and commercial climate control.

Sites that contain theory, information tables or other technical aspects of HVAC systems or components may be included here.

Semiconductors

user comments , electronic parts , semiconductor hall , electronic components , semiconductor materials

This category is for sites specifically related to the technology of semiconductor electronics as a science. Submissions of sites dealing with manufacturing and production should be made to the appropriate subcategory elsewhere in the directory.

Set Theory

axiom , university , equivalence relation , natural numbers , mathematics

Nuclear

atomic nucleus , cdte , crystal growth , protons , electrical conductivity

Sites and links concerning the science of nuclear physics. Different specialties are separated into their divisions.

Permaculture

permaculture , system , permaculture design , systems , natural systems

Permaculture is an integrated design system for sustainability. The word "permaculture" is a contraction of "permanent agriculture" or "permanent culture." Its roots are in the design of productive ecosystems for farms and gardens. A central theme in permaculture is the design of ecological landscapes that produce food. Emphasis is placed on multi-use plants, cultural practices such as sheet mulching and trellising, and the integration of animals to recycle nutrients and graze weeds. Permaculture concepts also reach beyond farming and gardens that into designs for all types of resilient, sustainable structures, both physical and social. It is a philosophy of maximum effort at the design stage to allow minimum effort and side-effects once the system is running, instead of the conventional method which is often the reverse.

Radon

radon , lung cancer , radiation , field rw , uranium

Finite Element Analysis

analysis , finite element analysis , finite element method , programs , software

General or multi-disciplined finite element codes.

If a finite element code is specific to an engineering discipline (Aerospace Engineering, Chemical Engineering, etc.) it should be submitted under the appropriate category.

Periodic Table

periodic table , element , elements , atomic number , properties

A selection of sites containing online versions of the periodic table of elements. Sites are classified according to the number of properties they display:

Very Basic: less than eight properties.
Basic: 9 - 16 properties.
Detailed: 17 - 24 properties.
Comprehensive: 25 - 32 properties.
Very comprehensive: more than 32 properties.

There are also notes when special software or browser features such as JavaScript are required.

Connecticut

persons , legal representation , norm pattis , domestic violence , law offices

Electrical Engineering

electrical engineers , kva , electrical engineer , transmission lines , engineers

Electrical engineering is a very broad field, ranging from all aspects of information processing, power production and power distribution. The main fields are electronics (including micro-, opto- and power electronics), communication technology, automation control, computer vision, and energy technology.

Geochemistry

stable isotopes , sulfur , fluid inclusions , barite hill , composition

Geochemistry is the study of chemical elements and their isotopes, and their distribution and abundance within minerals, ores, rocks, waters, and the atmosphere. Geochemistry also includes the dynamic aspects of reaction and circulation of the elements in nature. While geochemistry is most often used in reference to the Earth, it also applies to the study of the chemical elements and their isotopes on the moon and other planets.

Image Processing

first element , test target , millimeter , pixel profile , test element

This category contains links to research and state of the art technology in Image Processing. Image Processing is the computer manipulation of images. Some of the many algorithms used in image processing include convolution (on which many others are based), FFT, DCT, thinning (or skeletonisation), edge detection and contrast enhancement. These are usually implemented in software but may also use special purpose hardware for speed. Image processing contrasts with computer graphics, which is usually more concerned with the generation of artificial images, and visualisation, which attempts to understand (real-world) data by displaying it as an artificial image (e.g. a graph). Image processing is used in image recognition and computer vision. (source: Dictionary.com)

Helium

helium , liquid helium , gas , helium ii , atmosphere

Lithium

lithium , lithium chloride , lithium hydroxide , lithium metal , lithium carbonate

Beryllium

beryllium , chronic beryllium disease , compounds , cbd , beryllium metal

Boron

boron , boric acid , borax , borates , boron compounds

Carbon

carbon , graphite , carbon dioxide , compounds , element

Oxygen

oxygen , atmosphere , abundant element , combustion , oxygen gas

Fluorine

fluorine , hydrofluoric acid , fluorine gas , compounds , elemental fluorine

Neon

neon , helium , atmosphere , simple asphyxiant , element

Magnesium

magnesium , abundant element , precipitate , separation , magnesia

Silicon

silicon , silicon dioxide , silica , carbon , abundant element

Phosphorus

white phosphorus , phosphorus , phosphate rock , red phosphorus , phosphates

Chlorine

chlorine , chlorine gas , production , brine , hydrochloric acid

Calcium

calcium , calcium carbonate , lime , magnesium , abundant element

Scandium

scandium , molecular weight , pure scandium , marignac , gadolinite

Titanium

titanium , titanium dioxide , titanium metal , element , titanium tetrachloride

Vanadium

vanadium , vanadium pentoxide , pentavalent vanadium , scandinavian goddess , complexes

Manganese

manganese , manganese dioxide , manganese compounds , oxidation state , potassium permanganate

Iron

iron , pig iron , carbon , wrought iron , abundant element

Cobalt

cobalt , nickel , periodic table , evil spirit , health effects

Gallium

gallium , pure gallium , periodic table , plutonium , boisbaudran

Germanium

germanium , hydrochloric acid , gram , kilogram , element

Arsenic

arsenic , inorganic arsenic , arsenic trioxide , arsenic compounds , compounds

Selenium

selenium , tellurium , solar cells , electricity , sulfuric acid

Rubidium

rubidium , potassium , element , vacuum tubes , sodium

Yttrium

yttrium , heavy lanthanides , periodic table , small amounts , red phosphors

Zirconium

zirconium , zircon , corrosion , hafnium , zirconium dioxide

Niobium

niobium , element , tantalum , columbium , periodic table

Technetium

technetium , element , rhenium , pertechnetate , vii

Ruthenium

ruthenium , platinum , journal , aqua regia , ural mountains

Rhodium

rhodium , platinum , complexes , rhodium metal , iii

Palladium

palladium , platinum , hydrogen , platinum group metals , catalytic converters

Indium

indium , cent , iridium , gallium , liquid crystal displays

Tellurium

tellurium , selenium , telluric acid , blasting caps , element

Iodine

iodine , thyroid gland , element , molecular iodine , acidic solution

Xenon

xenon , atmosphere , gas , liquid air , neutrons

Cesium

cesium , caesium , atomic clocks , photoelectric cells , room temperature

Lanthanum

lanthanum , small amounts , periodic table , special optical glasses , motion picture industry

Cerium

cerium , rare earth elements , asteroid ceres , periodic table , element

Neodymium

neodymium , misch metal , neodymium glass , didymium , sharp absorption bands

Samarium

samarium , mineral samarskite , periodic table , boisbaudran , motion picture industry

Gadolinium

gadolinium , room temperature , mineral gadolinite , element , finnish chemist

Terbium

terbium , sweden , terbia , solid-state devices , other rare earths

Dysprosium

dysprosium , neutrons , nuclear reactors , room temperature , boisbaudran

Holmium

holmium , element , other rare earths , room temperature , monazite

Thulium

thulium , oxide , element , portable x-ray machines , other rare earths

Ytterbium

ytterbium , marignac , stainless steel , neutrons , element

Lutetium

lutetium , ancient name , ytterbium , element , paris

Hafnium

hafnium , zirconium , control rods , hafnium metal , neutrons

Tantalum

tantalum , niobium , camera lenses , greek mythology , high melting point

Tungsten

tungsten , tungstic acid , highest melting point , new york , element

Rhenium

rhenium , element , rhenium metal , alloys , molybdenite

Osmium

osmium , osmium tetroxide , iridium , tetroxide , ruthenium

Iridium

iridium , platinum , osmium , hardening agent , rhodium

Platinum

platinum , catalyst , aqua regia , alcohol , compounds

Gold

gold , gold leaf , aqua regia , nitric acid , south africa

Mercury

mercury , element , uranium , mercury compounds , environment

Mercury, also known as "Quick Silver," is the 80th element on the Periodic Table. It is a transition metal, and is the only metal that is in liquid form at room temperature. Although it has many practical purposes, it is very toxic and must be used with extreme caution.

Thallium

thallium , compounds , element , production , sir william crookes

Lead

lead , lead poisoning , metallic lead , lead salts , gasoline

Polonium

polonium , marie curie , alpha particles , radiation , half-life

Radon

radon , radium , lung cancer , stable isotope , half-life

Francium

francium , element , isotopes , marguerite perey , chemical properties

Radium

radium , uranium ores , uranium , marie curie , cancer

Thorium

thorium , uranium , nuclear fuel , environment , thorium reactors

Uranium

uranium , natural uranium , depleted uranium , nuclear reactors , planet uranus

Welcome to Uranium, one of the most desired elements by third-world nations! Uranium is #92 on the Periodic Tables, and is used in producing energy as well as nuclear bombs.

Neptunium

neptunium , uranium ores , half-life , element , nuclear reactors

Berkelium

berkelium , alpha particles , periodic table , half-life , berkeley

Californium

californium , strong neutron emitter , university , radioactive metal , periodic table

Fermium

fermium , isotope , chemical properties , periodic table , half-life

Mendelevium

mendelevium , periodic table , bombarding einsteinium , half-life , chemical properties

Nobelium

nobelium , half-life , nobel institute , protons , periodic table

Lawrencium

lawrencium , half-life , mev , ernest o. lawrence , isotopes

Rutherfordium

rutherfordium , half-life , isotope , atoms , element

Dubnium

dubnium , nuclear research , joint institute , scientists , atoms

Seaborgium

seaborgium , half-life , periodic table , spontaneous fission , synthesis

Bohrium

bohrium , periodic table , berkeley lab , chemistry , element

Hassium

hassium , synthesis , atoms , gsi , osmium

Actinides

plutonium , actinides , lawrence livermore , scientists , lawrence livermore scientists

Alkali Earth Metals

alkaline earth metals , electrons , magnesium , nucleus , ionisation energies

The alkali earth metals are the elements in group 2 of the periodic table, that is: beryllium, magnesium, calcium, strontium, barium and radium.

Alkali Metals

alkali metals , nucleus , outermost electron , ionic crystalline solids , sodium carbonate

The alkali metals are the elements in group 1 of the periodic table excluding hydrogen, that is: lithium, sodium, potassium, rubidium, caesium, and francium.

Halogens

halogens , fluorine , chlorine , bromine , electrolysis

The halogens are the elements in group 17 of the periodic table, that is: fluorine, chlorine, bromine, iodine, and astatine.

Hydrogen

hydrogen , gas , hydrogen gas , hydrogen atom , compounds

Nonmetals

oxidation state , oxidation states , lower electronegativity , atom , non-metals

Welcome to the home of NonmetalS! Nonmetal elements possess high ionization energies and have high electronegativities. They tend to gain electrons when in combination with metals, or to share electrons when in combination with other elements. They tend to be brittle in the solid phase, to have low thermal and electrical conductivities, and to lack metallic luster. Here you can find information about the chemical and physical properties of nonmetals!