this element is under alkali earth metal helps to granules
Selenium - Wikipedia
Selenium has seven naturally occurring isotopes.Five of these, 74 Se, 76 Se, 77 Se, 78 Se, 80 Se, are stable, with 80 Se being the most abundant (49.6% natural abundance).Also naturally occurring is the long-lived primordial radionuclide 82 Se, with a half-life of 9.2×10 19 years. 
Periodic Trends | Chemistry [Master]
The non-metal halide liquids are also electrical insulators and do not conduct electrical current. In contrast, when an alkali halide or alkaline earth halide melts, the resulting liquid is an excellent electrical conductor. This tells us that these molten compounds consist
On the position of helium and neon in the Periodic Table …
1/11/2017· Hydrogen is as much an alkali metal as helium is an alkali earth metal (as Fig. 6, top left part clearly shows). As Schwarz has insightfully put it in his e-mail exchange with this author (2016), there are as many versions of the Table as many features you expected to be asseled, rationalized, and taught to students.
Metals | Encyclopedia
Alkali metals also react with oxygen to produce either an oxide, peroxide, or superoxide, depending on the particular meer of the alkali metal family involved. Shiny and soft enough to be cut with a knife, the alkali metals are usually white, though cesium is a yellowish white.
Alkali Metals Elements - Chemistry Resources
It is the sixth most abundant element in the earth''s crust, occurring in large amounts in both (sea)water and soil in various mineral compounds, the most common of which is sodium chloride. The metal melts below the boiling point of water (97oC).
Sodium chloride comprises 97%-99% of table salt. Given …
Sodium chloride comprises 97%-99% of table salt. Given their loion on the periodic table, identify the ionic charge for each element and predict the chemical formula of the compound formed. A) Sodium, Na, is an alkali metal and is in Group IA with an ionic
2.8 End-of-Chapter Material | The Basics of General, …
An element is a substance that cannot be broken down into simpler chemical substances. Only about 90 naturally occurring elements are known. They have varying abundances on Earth and in the body. Each element has a one- or two-letter chemical syol. .
NL194672C - Process for the preparation of spherical …
A porous and spherical silica is recovered in high yields from a neutralized product of an alkali silie obtained by using an acrylamide type polymer as a coagulation growing agent, and the above silica is reacted as a precursor with a metal compound of the Group
Interesting facts about LANTHANUM (periodic table …
8/4/2008· Lanthanum is a silvery white metallic element that belongs to group 3 of the periodic table and is a lanthanide. Found in some rare-earth minerals, usually in coination with cerium and other rare earth elements. Lanthanum is malleable, ductile, and soft enough to
Tungsten - Wikipedia
Tungsten, or wolfram,   is a chemical element with the syol W and atomic nuer 74. The name tungsten comes from the former Swedish name for the tungstate mineral scheelite, tungsten which means "heavy stone".  Tungsten is a rare metal found naturally on Earth almost exclusively coined with other elements in chemical compounds rather than alone.
Name ___________________________ Class ___________________ Date
Circle the letter of each type of information Mendeleev knew about each element. a. name b. nuer of protons c. relative mass d. properties 7. Mendeleev arranged the elements into rows in order of _____ so that elements with similar 8.
Atoms of noble gases. Medical search. FAQ
atoms of noble gases. FAQ. Medical Information Search Differential Thermal Analysis Microscopy, Electron Microscopy, Electron, Scanning Microscopy, Electron, Transmission Electron Spin Resonance Spectroscopy Models, Molecular Mandibular Reconstruction Surgical Instruments
Phosphorus - Wikipedia
Phosphorus Pronunciation / ˈ f ɒ s f ər ə s / (FOS-fər-əs) Appearance Colourless, waxy white, yellow, scarlet, red, violet, black Standard atomic weight A r, std (P) 30.973 761 998 (5)  Abundance in the Earth''s crust5.2 (silicon = 100) Phosphorus in the periodic table
Which alkaline metal is most reactive? | Yahoo Answers
9/1/2007· Francium. An alkali metal is any element other than hydrogen found in the first column of the periodic table. These elements include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs) and francium (Fr). Do not confuse this term with the word
Unit 1 lesson 13 ppt - LinkedIn SlideShare
Metals• metal • alkali metal• luster • alkaline earth metal• ductility • transition element• malleability properties like those of nonmetals.• However, hydrogen also has some properties similar to those of the group 1 alkali metals.• Under conditions on Earth
What is the reaction of an alkali metal with liquid …
All alkali metals dissolves in liquid ammonia and produce blue coloured solutions which are conducting and reducing in nature due to presence of ammoniated electron.The ammoniated electron which absorbs energy in the visible region of light and
Alkaline-earth Metals | Encyclopedia
ALKALINE EARTH METALSCONCEPT The six alkaline earth metals — beryllium, magnesium, calcium, strontium, barium, and radium — comprise Group 2 on the periodic table of elements. This puts them beside the alkali metals in Group 1, and as their names suggest, the two families share a nuer of characteristics, most notably their high reactivity. . Also, like the alkali metals, or indeed any
Flame Photometry (Theory) : Advanced Analytical …
The flame emissions of the alkali and alkaline earth metals in terms of the emission wavelength and the characteristic color produced by each element is shown in table 1 Name of the element Emitted wavelength range (nm)
6.4 Patterns in the Periodic Table - Altervista
6.4 Patterns in the Periodic Table Th e periodic table is arranged in a particular way. All the elements in the same column have similar physical and chemical properties (Figure 1). If your classroom seating plan were organized in this way, everyone sitting in the