Periodic Table
The Periodic Table is a tabular arrangement of the elements in increasing order oftheir atomic numbers, so that elements with similar properties are in the same column. There are 18 columns, called groups, and seven rows, which are called periods, in the modern periodic table. Questions about the Periodic Table: its history and creation, trends, groups/families, and periods are asked in our Periodic Table category.
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added How is the alkali metal family different from all other families on the periodic table to Periodic Table 26 May 2012 09:59
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added Reason of position of Gr. VIII of the periodic table to Periodic Table 26 May 2012 07:37
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wrote the first answer to What is the periodic element for krypton 26 May 2012 05:43
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wrote the first answer to What is a common property of metals 26 May 2012 04:01
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Alijanali-kool-aid -soap (depends what type) -jell-o -garden soil -ice tea -green ink -steel -cup of coffee -cough medicine ...
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Molybdenum is the 54th most abundant element in the Earth's crust and the 25th most abundant element in the oceans, with an...
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No. Nickel is one of the base elements on the periodic table. Some compounds with Nickel may be man made, but Nickel itself is...
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because the outermost energy level has 8 electrons
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Generally the elements become more dense as you move down the periodic table. Consider the halogens and the alkali metals for...
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Sodium does not have naturally occurring radioactive isotopes - as it has only 1 naturally occurring isotope, which has 11...
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The periodic table is a table made of 7 periods (rows) and 18 columns from column 3 -->12 they are called transitional...
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At the left, especially the lower left, and at the right, especially the upper right, of a hypothetical periodic table that is...
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Yes. If the chloroform is in a confined space, only a small fraction of it will evaporate, but if gas circulation sweeps away the...
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The modern periodic law states that, "the physical and chemical properties of elements are periodic functions of their atomic...
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Every atom tends to complete 8 electrons in outermost shell by gaining on , by losing off or by sharing of electrons.
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Gold, Au, is element number 79, in Group 11 Period 6.
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Compare the density of the unknown object to the density of known substances.
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Ribose usually refers to D-ribose, which is one of two enantiomers of ribose, the other being L-ribose. D-ribose is formed...
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first : ))))))) 2 elements - H and He
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Since not long after the formation of the first stars, over 11 billion years ago. It is a product of stellar nuclear fusion.
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Dmitri Ivanovich Mendeleev (1834 - 1907)
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We know that H is the chemical symbol for the element hydrogen. A link can be found below for more information.
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Because the symbols are the first one/two letters of their Latin name. For example Iron is Fe because the latin name for iron is...
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They are called groups or families. Often the elements that are found in the same group as each other have similar chemistry and...
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argon is a gas an element and it comes from and Argo means radioactive
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There are 11 elements that are gasses at RT (taking RT as 25 degrees celcius) and 1 atm pressure. These are Hydrogen Nitrogen...
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Titanium-Found it from my Science Textbook
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lothar meyer devised a classification of elements into a table that accounted for the periodic variation in properties. his table...
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Lanthanum and its fourteen following members of the lanathanide inner transition elements all belong in the indicated location,...
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hi : ) it's KSO4 just with a little 4 : ) EDIT: This is incorrect. Potassium sulfide = K2S Potassium sulfate = K2SO4
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The atomic number of lithium (Li) is 3. The atomic weight of Li is 6.941 amu, and the molar mass 6.941 grams per mole. See the...
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Atomic number and electron configuration Elements in the periodic table are arranged in order of increasing atomic number (which...
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They are non-metals.
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The answer varies depending on whether or not you are dealing with an ionic compound or a pure substance. Other substances will...
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The nucleus of an atom contains sub atomic particles such as protons which are positively charged and neutrons which do not have...
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An element. eg soduim: NaYou can get diatomic and polyatomic ions/molecules like O2 and S8 which are normally gaseous. These...
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Third alkaline metal is potassium and first transition metal is scandium
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Not really, although it can be heated until it boils and evaporates.
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Type your answer here... no because one is asking for the total which is a number.the other one is asking for what is mostly in...
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Uranium-237 decays by beta- decay to Neptunium-237 with a half-life of 6.75 days, emitting a W- boson which then decays to an...
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This all depends on the element's atomic number (number of protons). Since atoms have the same number of protons as they do...
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By dividing the number of puppies by the number of kitties then multiplying it by the number of ponies that jump over the rainbow...
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yes...the italic ownage is very crystally....
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If resonance is related to hardness (and it is) then the most resonant metal would be Beryllium.
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The atomic number of aluminum (Al) is 13. The atomic weight of Al is 26.981539 amu, and the molar mass 26.981539 grams per mole....
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they termed as lanthanide because the lighter elements in series are chemically similar to lanthanum
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Hydrogen, oxygen, carbon, silicon, bromine
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34 protons 64 electrons
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The groups have two different numbering systems.The elements in a group have similar properties.All elements in a column are in...
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period number represents how many shells of electrons the atom has and group number represent how many electrons in the outer...
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All of the alkali metals, periodic column 1 excluding hydrogen in a wide form periodic table, and all but the two lightest...
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i may be wrong but i think it is 55, that's the atomic number (i dunno if that's the mass, im only in year 7 >.<)
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outline the steps in the development of the periodic table.(dobereiner,triads,and mendeleev)
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A noble gas element has as many valence electrons as are needed to completely fill its valence shell: 2 for helium and 8 for all...
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I think it is cesium. If not, my apologies, ask again.
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didn't have all the elements
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Among all the main groups the trend of increasing atomic size down the group is observed.This is because of addition of extra...
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The atomic number of oxygen (O) is 8 - this means that it's ionic charge is 2-. The atomic weight of O is 15.9994 grams per...
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Presidents Andrew Johnson and Bill Clinton were impeached and both were later acquitted. Richard Nixon almost got impeached but...
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The atomic number of an element depends on the number of protons in that element.
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The game.
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Hydrogen (H) Helium (He) Lithium (Li) Beryllium (Be) Boron (B) Carbon (C) Nitrogen (N) Oxygen (O) Fluorine (F) Neon (Ne) Sodium...
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No, the atomic mass of Hydrogen is 1.
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A couple problems with this question: 1. There is no such compound as NaCl3. 2. Sodium is an alkali metal and Cl is a halogen,...
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silicon is 4 not 6
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If consumed rubidium may be poisonous, but other wise it isn't.
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all s orbitals are spherical
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I think you need to learn grammar before you learn chemistry.
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grouping of emelemts by color
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They are named after old terms for the elements, people who discovered them, places, etc.
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It is found in soda- as in baking soda, not the soft drink. It's symbol, Na, is from the greek word for soda, natrum.
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S. The rule starts applying after the second row.
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Bromine is an element and can't be "made" from any other element (except by a nuclear reaction). However, since the question asks...
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Electron screening is the best reason for there being more reactivity as an investigator looks down the Group 1 elements, which...
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Yes, hafnium is reactive, but not like sodium or potassium.
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At standard temperature and pressure, only iodine in its most common form. Carbon, silicon, germanium, sulfur, and phosphorus...
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Third period, column 16.
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As it loses two electrons in order to complete its octet.
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as it has only one proton and electron and no neutrons
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Sometimes the symbol comes from two consecutive letters in the element name, as with Calcium (Ca), sometimes two non-consectutive...
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Vinegar's formula is very dilute CH3COOH. Vinegar is mainly water (H2O), but is also comprised of acetic acidic (the boxlike...
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See the Web Links to the left for a pdf file with a periodic table which shows the electronic configuration (in shorthand...
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The atomic number tells you the number of protons in the nucleus of an atom of the associated element.
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For one thing there would be no water since hydrogen is made up of hydrogen and oxygen.
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Neon's atomic # is 10 so it has 10 protons
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dipole moment of ch4 is zero .the ch4 is tetrahedral in shape thus each bond pair are at equal distance that is they are...
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