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3Explanation:bro wave doesn't mean spectral lines....... as U KNOW the relation B/w CIRCUMFERENCE of orbit and wavelength....... 2πr=n× wavelength. where, n= no. of orbit = no. of WAVES.....

O 21%C6%EXPLANATION:NA 23%.................

Yes spectral line is a wave. A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from EMISSION or absorption of LIGHT in a narrow frequency range, compared with the nearby frequencies. Spectral lines are OFTEN USED to identify atoms and molecules.

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d BLOCK EXPLANATION:ACCORDING to me

l PROPERTIES:Metals are lusturous.Metals are sonorous.Metal are not brittle.Opposite for non metalsChemical properties:Metals donate electrons.Their oxides and hydroxides are basic.They DISPLACE LESS REACTIVE metals from their respective salt Solutions.orThey USUALLY don't react with air.

____________First You Must Know___________________The PICKLE usually contain acid that can be predicted by their sourness. The acid usually reacts with the highly reactive metals. Acids in FOOD items reacts with metal and PRODUCE the harmful toxic SUBSTANCE which is dangerous for health. The substance which can be used to store acid containing food items are:-PlasticGlassSteelDifferent AlloysPolythen GoldSilverPlatinumFlaskand MUCH morePlease Mark As Brainlist........

ments which have partially FILLED d-orbitals either ground state or in one or more of their IONS, are CALLED d-block elements or OUTER TRANSITION elements.

the PROCESS of depositing a layer of zinc on iron is CALLED GALVANISATION. GALVANISED iron is considered better than tin plated iron because it PREVENT it from rusting and being damaged.. For ExampleThe iron water pipes which are used to supply water to homes are galvanised to prevent rusting

CH4N2OExplanation:I HOPE this will HELPFUL to you and PLS MAKE me as BRAINLIST

tion:1--singlebond2 DOUBLE bond3 TRIPLE BOND

1. Because of its lightness and non-inflammability HELIUM is USED to FILLING balloons for METEOROLOGICAL observations.2. Because of its lightness it is used in inflating aeroplane tyres.

The packing EFFICIENCY is the FRACTION of the crystal (or unit cell) ACTUALLY occupied by the atoms. It must always be LESS than 100% because it is impossible to PACK spheres (atoms are usually spherical) without having some empty space between them.HOPE THAT HELPEDHAVE A GREAT DAY♡♡♡♡

The noble gases are USED in industry in arc welding, to dilute the OXYGEN in deep-sea divers' gas tanks, and to FILL light bulbs. ARGON is used in arc welding and in common light bulbs, as it does not react with the metal at high temperatures.PLZ mark as BRAINLIEST.#rishabh writes

A mixture is FORMED by combining TWO or more materials. A homogeneous mixture appears uniform, regardless of where you sample it. ... Examples of homogeneous mixtures include air, saline solution, most alloys, and bitumen. Examples of HETEROGENEOUS mixtures include SAND, oil and water, and chicken NOODLE soup.

For Covalent bonds, atoms tend to share their ELECTRONS with each other to satisfy the Octet Rule. It requires 8 electrons because that is the amount of electrons NEEDED to fill a s- and p- ORBITAL (electron configuration); ALSO known as a noble gas configuration..

3.7 gram of Ammonium Chloride would be needed to make a saturated solution in 10 gram of waterExplanation:GivenSolubility of Ammonium Chloride (NH₄Cl) at 293 K is 37 gram/100 mLi.e. 37 gram of NH₄Cl is SOLUBLE in 100 mL of wateror, 37 gram of NH₄Cl is soluble in 100 gram of WATER  (∵ DENSITY of water = 1g/ml)∵ In 100 gram of water AMOUNT of NH₄Cl soluble = 37 gram∴ In 1 gram of water, amount of NH₄Cl soluble = 37/100 gram                                                                               = 0.37 gram∴ In 10 gram of water, amount of NH₄Cl soluble = 0.37 × 10 = 3.7 gramTherefore, 3.7 gram of Ammonium Chloride would be needed to make a saturated solution in 10 gram of water

Like alkali metals, their reducing character ALSO increases down the GROUP. Reason: The alkaline earth metals have a fairly strong tendency to lose two ELECTRONS to form dipositive ions because of their low ionization ENTHALPIES and HIGH negative values of standard electrode potentials.

I THINK OPTION d BRO I don't WHETHER is it or not

on potential is BASED on Ionisation ENERGY ( which must be low), enthalpy of ATOMISATION ( which must also be low)and hydration enthalpy ( which should be high)Alkali metals have very low Ionisation energy which makes it more reducing ( gives away its ELECTRON happily ) so they must have HIGHLY negative reduction potential

When you have a polar molecule, your bonds will not cancel out. This means that in a polar BOND, the electronegativity of the atoms will be different. For NONPOLAR bonds the electronegativity of the atoms will be equal. In a polar bond you will have an unequal SHARING of ELECTRON pairs which CAUSES a molecular dipole...

a SUBSTANCE which give HYDROXIDE ion in aqueous SOLUTION Base have bitter taste Base TURNS red litmus paper to blue litmus paper Base CONDUCT electricity

by USING CONDENSATION

tion:4 NO is LIMITING FACTOR

a. 17u B. 60u C. 36u EXPLANATION: a. 14+1×3=17u b. 12+1×3+12+16+16+1=60u c.12×2+1×5+16+1=36 uExplanation:

️ Acid are the SUBSTANCE which produce H+ ions when dissolved in aqueous solutions.⏭️ They are sore in taste and have PH less than 7. ⏭️ They TURN blue LITMUS red.⏭️ Example : HCl, H2SO4 etc.

anmol asked KUNAL if he had prepared his speech for the competition to which kunal replied POSITIVELY. anmol asked kunal how he was confident on the stage to which kunal replied that anmol should not be afraid of being on the stage.it was not tough. and that kunal will hwlp anmol with the matter.anmol thanked kunal and said that he would also participate in the speech competition. he assured kunal that his guidance would HELP him perform better.PLS pls mark as brainliest

first find TOTAL HEAT of FORMATION of PRODUCT then total heat of formation of reactant heat of formation = heat of reactant -heat of product

od containing oil and fat is kept in an open air, it undergo oxidation and become rancid; due to which their smell and taste changes this process is CALLED rancidity. Usually, to avoid rancidity in food containing oil and fat, substances are ADDED which prevent oxidation. Such substance are known as antioxidant substance. Food kept in air TIGHT containers helps to slow down its oxidation and rancidity is retarded. Manufacturers of POTATO chips flush bags of chips with gas such as inactive Nitrogen gas as antioxidant to prevent the oxidation of potato chips.Please mark me as BRAINLISTPLEASE

CH3CH2OH→(SOCL2)CH3CH2CL→(CH≡CNa)CH3CH2C≡CHExplanation: