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e!Iso-electronic SPECIES are the species that have same NUMBER of ELECTRONS. K^+, S^2-, Cl^- and Ca^2+ has 18 electrons each. Therefore, the order is:Ca^2+ < K^+ < Cl^- < S^2-That's the answer!HOPE it helps :)

e!The chemical NAME of Ch3Cl is METHYL CHLORIDE. Hope it helps :)

ar (Latin: CARBO animalis) is a POROUS, black, GRANULAR material PRODUCED by charring animal bones. Itscomposition varies depending on how it is made; however, it CONSISTS mainly of tricalcium phosphate (or hydroxylapatite) 57–80%, calcium carbonate 6–10% and carbon

rbons are classified into saturated hyrocarbons and UNSATURATED hydrocarbons.Hydrocarbons are MADE up of single bond and unsaturated hydrocarbons are made up of double or triple bonds.Hope this HELPS HUH ☺☺☺

nAtomic Number: 1Element Symbol: HNumber of PROTONS: 1Number of Electrons: 1Number of Neutrons: 0Atomic Mass: 1.01HeliumAtomic Number: 2Element Symbol: He Number of Protons: 2Number of Electrons: 2Number of Neutrons: 2Atomic Mass: 4LithiumAtomic Number: 3Element Symbol: LiNumber of Protons: 3Number of Electrons: 3Number of Neutrons: 4Atomic Mass: 6.94Upgrade to REMOVE adsOnly $1/monthBerylliumAtomic Number: 4Element Symbol: BeNumber of Protons: 4Number of Electrons: 4Number of Neutrons: 5 Atomic Mass: 9.012BoronAtomic Number: 5Element Symbol: BNumber of Protons: 5Number of Electrons: 5Number of Neutrons: 5Atomic Mass: 10.81CarbonAtomic Number: 6Element Symbol: CNumber of Protons: 6Number of Electrons: 6Number of Neutrons: 6Atomic Mass: 12.01NitrogenAtomic Number: 7Element Symbol: NNumber of Protons: 7Number of Electrons: 7Number of Neutrons: 7Atomic Mass: 14.01OxygenAtomic Number: 8Element Symbol: ONumber of Protons: 8Number of Electrons: 8Number of Neutrons: 8Atomic Mass: 15.999FluorineAtomic Number: 9Element Symbol: FNumber of Protons: 9Number of Electrons: 9Number of Neutrons: 10Atomic Mass: 19.00NeonAtomic Number: 10Element Symbol: NeNumber of Protons: 10Number of Electrons: 10Number of Neutrons: 10Atomic Mass: 20.18SodiumAtomic Number: 11Element Symbol: Na Number of Protons: 11Number of Electrons: 11Number of Neutrons: 12Atomic Mass: 22.99MagnesiumAtomic Number: 12Element Symbol: MgNumber of Protons: 12Number of Electrons: 12Number of Neutrons: 12Atomic Mass: 24.31AluminiumAtomic Number: 13Element Symbol: AlNumber of Protons: 13Number of Electrons: 13Number of Neutrons: 14Atomic Mass: 26.98SiliconAtomic Number: 14Element Symbol: SiNumber of Protons: 14Number of Electrons: 14Number of Neutrons: 14Atomic Mass: 28.09PhosphorusAtomic Number: 15Element Symbol: PNumber of Protons: 15Number of Electrons: 15Number of Neutrons: 16Atomic Mass: 30.91SulferAtomic Number: 16Element Symbol: S Number of Protons: 16Number of Electrons: 16Number of Neutrons: 16Atomic Mass: 32.07ChlorineAtomic Number: 17Element Symbol: ClNumber of Protons: 17Number of Electrons: 17Number of Neutrons: 18Atomic Mass: 35.45ArgonAtomic Number: 18Element Symbol: ArNumber of Protons: 18Number of Electrons: 18Number of Neutrons: 22Atomic Mass: 39.95PotassiumAtomic Number: 19Element Symbol: KNumber of Protons: 19Number of Electrons: 19Number of Neutrons: 20Atomic Mass: 39.10CalciumAtomic Number: 20Element Symbol: CaNumber of Protons: 20Number of Electrons: 20Number of Neutrons: 20Atomic Mass: 40.08ScandiumAtomic Number: 21Element Symbol: ScNumber of Protons: 21Number of Electrons: 21Number of Neutrons: 24Atomic Mass: 44.956TitaniumAtomic Number: 22Element Symbol: TNumber of Protons: 22Number of Electrons: 22Number of Neutrons: 26Atomic Mass: 47.867VanadiumAtomic Number: 23Element Symbol: VNumber of Protons: 23Number of Electrons: 23Number of Neutrons: 27Atomic Mass: 50.942ChromiumAtomic Number: 24 Element Symbol: CrNumber of Protons: 24NUMBER of Electrons: 24Number of Neutrons: 24Atomic Mass: 51.996ManganeseAtomic Number: 25Element Symbol: MnNumber of Protons: 25Number of Electrons: 25Number of Neutrons: 30Atomic Mass: 54.938IronAtomic Number: 26Element Symbol: FeNumber of Protons: 26Number of Electrons: 26Number of Neutrons: 28Atomic Mass: 55.845CobaltAtomic Number: 27Element Symbol: CoNumber of Protons: 27Number of Electrons: 27Number of Neutrons: 32Atomic Mass: 58.933NickelAtomic Number: 28Element Symbol: NiNumber of Protons: 28Number of Electrons: 28Number of Neutrons: 30Atomic Mass: 58.693CopperAtomic Number: 29Element Symbol: CuNumber of Protons: 29Number of Electrons: 29Number of Neutrons: 35Atomic Mass: 63.546ZincAtomic Number: 30Element Symbol: ZnNumber of Protons: 30Number of Electrons: 30Number of Neutrons: 35Atomic Mass: 65.38

y SOLIDS dissolved in liquidwater, the solubility increases with TEMPERATURE. The increase in kinetic energy that COMES with higher temperatures allows the solvent molecules to more effectively break APART the solute molecules that are held together by intermolecular attractions.

amount of solute PRESENT in a SOLVENT is more, then it is a CONCENTRATED solution.Hope it helps u.pls MARK this as brainliest

otally right, modern PERIODIC table is based on ATOMIC number" The properties of ELEMENTS are periodic FUNCTION to their atomic number "

model of atomJJ Thomson in 1904 proposed that :◆ An atom is a uniform SPHERE of positive electricity in which electrons are embedded.◆ The negative and positive charge are equal in magnitude. So the atom is electrically neutral.Thomson model is ALSO called watermelon model.Drawbacks of Thomson modelAlthough Thomson model was able to explain the overall neutrality of the atom, it FAILED to explain the result of Rutherford alpha ray scattering EXPERIMENT. It was therefore soon rejected.

ks down to form 2 molecules of water and one molecule of oxygen gas, ACCOMPANIED by heat ENERGY. it will decompose slowly as the bottle is OPENED as the oxygen is started releasing...PLZ mark as brainlist is usefull.....

s WRONG STATEMENT

its VALENCY is -1

k me brainlistmg + CO2= mgo2+ cmeans that when MAGNESIUM reacts with CARBONDIOXIDE then then magnesiumoxide is produce and CARBON is RELEASE

s the CHEMICAL FORMULA of Nonane.Hope it HELPS.

n only has one electron and therefore has a configuration of 1s1. In order to FILL it's energy level it only needs one more electron OBTAIN a full outershell (1s2). This is why we only put two electrons on Hydrogen atoms when drawing Lewis structures.Here is yr PROPER answer ....Hydrogen ions (at LEAST H+) have no electrons. Hydrogen is the simplest element with only one proton and one electron, if it has a charge of plus one, it would have had to lose that one electron.Hope u like my INFORMATION ....

measure cell CONSTANT using 0.01N KCL and 0.001N KCl the VALUES different. When cell constant is totally GOVERN by the geometry of electrode.

the PRECIPITATE formed.It is of YELLOW colourYes it is DOUBLE DISPLACEMENT reaction.Hope it HELPS you!!!!!!!

gen has only one electron so it will gain 1 electron to attain duplet.2)OXYGEN has 6 ELECTRONS in it's outermost shell so it will gain 2 electrons and attain OCTET..HOPE it helpsmark brainliest.

the CORRECT OPTION

Pa=partial PRESSURE P=Total pressure X=Mole FRACTION

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TION REACTION:CaO + H2O → Ca(OH)2 Calcium oxide(lime) combined with WATER gives Calcium HydroxideDECOMPOSITION REACTION:2H2O2 → 2H2O + O2Hydrogen peroxide decomposed in the PRESENCE of catalyst Manganese (IV) oxide…HOPE THIS ANSWER HELPS YOU…

soda is also known as SODIUM hydrogen carbonate (NaHCO3)It's USES---1. Preparing BAKING powder.2. Used as an antacid in medicines .3. Used in soda-acid fire exitingiushers.

sed for a VARIETY of things, such as a COOLANT for COMPUTERS in MEDICINE to remove UNWANTED skinwarts and pre-cancerous cellin cryogenics

!Sustainable development MEANS development that TAKES place without damaging the environment.It meets the need of the present without COMPROMISING the needs of future GENERATIONS . Therefore, resources should be utilised judiciously so that after fulfilling our present requirements.Hope it helps

tion:a) Compound A which serves as a solvent in a cough syrup is an ethanol.Compound A = b) When we heat the ethanol in presence of sulfuric acid dehydration occurs in which WATER MOLECULE is removed and unsaturated hydrocarbon i.e. ethene gas is produced.Compound B = Ethene =c) The electron dot structure of B is given in an image.d) Ethene with hydrogen gas undergoes addition reaction in which hydrgen atom gets added to ethene molecule to GIVE SATURATED hydrocarbon that is ethane.This type of reaction is TERMED a Hydrogenation.

ay be caused by long - term exposure to dust containing silicon compounds.•High risk industries quarrying, granite, slate, sandstone, mining stone MASONRY, sand blasting and stone masonry, sand blasting GLASS and pottery work. •Inhaled silica particles accumulate in the alveoli.•The particles are ingested by macrophages, and are actively TOXIC to these cells.•The inflammatory reaction is triggered when the macrophages destroy the particles and this results in significant fibrosis.•Silicosis appears to predispose to the development of tuberculosis, which RAPIDLY progresses to TUBERCULAR bronchopneumonia and possibly military TB.•Gradual destruction of lung tissue leads to progressive reduction in pulmonary function, pulmonary hypertension and heart failure.•Asbestosis caused by inhaling asbestos fibre usually develops after 10 to 20 years exposure but sometimes after only 2 years.•Asbestos miners and workers involved in making and using some products containing asbestos are at risk.•There are different types of asbestosis but blue asbestosis is associated with the most serious disease.

ee GASES are:CFCS i. E. Chlorofluorocarbons CO2 i. e. CarbonoxideCH4 i.e.MethaneThese above gases are responsible for Global Warming.

Hey it is three SINGLE BOND only 4won't comeExplanation:HOPE you UNDERSTAND

ternal job vacancies for free. DEVELOP a regular secondary income by introducing GOOD candidates INTERNALLY. Your company HUNTS for talent as a team.mark me as brainlist ANSWER

e to extensive HYDROGEN BONDING in CARBOXYLIC ACIDS.

asons : (i) acetylation of aniline reduces its activation effect. (ii) ch3nh2 is more BASIC than c6h5nh2 . (iii) although –nh2 is o/p DIRECTING group, yet aniline on nitration gives a significant amount of m-nitroaniline. 22. Ûúö¸þö ¤üßוö‹ : 1 × 3 = 3 (i) ÿöö¯ößµö ã£öö×µöÿ¾ö h2o ãöê h2 te ÿöûú ûú´Ans. (a) Because with acetylation of aniline is result in decrease of electron density on nitrogen so activation effect reduces. (b) CH3NH2 is more basic than C6H5NH2because of positive I effect. (c) Although amino group is o, p- directing in aromatic electrophilic substitution reactions, aniline on nitration gives a SUBSTANTIAL amount of m-nitroaniline: Nitration is carried out in an acidic medium. In an acidic medium, aniline is protonated to give ANILINIUM ion (which is meta-directing). For this reason, aniline on nitration gives a substantial amount of m-nitroaniline.SO MARK AS BRAINIEST PLEASE.

The ENERGY of an electron in the SECOND orbit of hydrogen  ATOM is .The RADIUS of the second orbit :Explanation:The energy on the nth orbital is given by = Where  k= The energy of an electron in the second orbit of hydrogen  atom :N = 2, Z=1The radius of the nth orbit is given by ;The radius of the second orbit :