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Vanadium-1s^22s^22p^63s^23p^63d^34s^2Copper-(1s^2) (2s^2 2p^6) (3s^2 3p^6 3d^10) (4s^1)

thank you so much

He has only 2 elections , and when it has +2 charge , then no. of electrons will be 0.

so, option b

force per unit area is called pressure and its Si unit is pascal

7 protons, 8 neutrons, 10 electrons

total 38 protonsand 88-38=50 neutrons

In one atom of ammonia,Number of Electrons = 10Number of Protons = 10Number of Neutrons = Mass Number - Atomic Number = 17 - 10 = 7 Neutrons.

Given--- Mass of Ammonia = 1.7 grams. Molecular mass of Ammonia = 17 grams.

Number of Atoms = (Mass/Molecular mass)× Avogadro's Number(NA) = (1.7/17)× Avogadro's Number = 0.1× Avogadro's Number = 0.1 Na

∵one atom of Ammonia contains 7 Neutrons.∴, 0.1 Na ---------------------------------- 7× 0.1 Na = 0.7 Na = 0.7 × NaSince Na = 6.022× 10²³Thus, Number of Neutrons = 0.7 × 6.022× 10²³ = 4.2154 × 10²³ Neutrons.

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Proton—positive;electron—negative;neutron—no charge. The charge on theprotonandelectronare exactly the same size but opposite. The same number ofprotonsandelectronsexactly cancel one another in a neutral atom.

Proton - (1) positive charge , (2) get attracted towards positive charge , (3)present outside the nucleus.Electron - (1) Negative charge , (2) get attracted towards negative charge , (3)present in the nucleus.Neutron - (1) No charge, (2) do not get attracted as they are neutral , (3) Present in the nuclear of an atom.

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Electronic Voting Machine(also known asEVM) isvotingusingelectronicmeans to either aid or take care of the chores of casting and counting votes. ... With theEVM, instead of issuing a ballot paper, the polling officer will press the Ballot Button which enables thevoterto cast theirvote.

engineering,electric machineis a general term formachinesusingelectromagnetic forces, such aselectric motors,electric generators, and others. They areelectromechanicalenergy converters: an electric motor converts electricity to mechanical power while an electric generator converts mechanical power to electricity. The moving parts in a machine can be rotating (rotating machines) or linear (linear machines). Besides motors and generators, a third category often included istransformers, which although they do not have anymoving partsare also energy converters, changing thevoltagelevel of analternating current.

Electric machines, in the form of generators, produce virtually all electric power on Earth, and in the form of electric motors consume approximately 60% of all electric power produced. Electric machines were developed beginning in the mid 19th century and since that time have been a ubiquitous component of the infrastructure. Developing more efficient electric machine technology is crucial to any global conservation,green energy, oralternative energystrategy.

Electronic Machine is made up By connecting Electronic Devices to form a machine to perform a task, or a job like Audio Machine to play sound, video or to display picture

Electronic Machineis made up By connectingElectronicDevices to form amachineto perform a task, or a job like AudioMachineto play sound, video or to display picture.

1

1 proton weighs 1.67×10⁻²⁷ kg∴x protons weigh 2 kg

∴x=2/(1.67×10⁻²⁷)=1.198 ×10²⁷ protons.

Buddha Dharma sansthapak kaun hai

The answer is 1.198× 10^27

Sewage And WasteWater: Sewage, garbage and liquid waste of households, agricultural lands and factories are discharged into lakes and rivers. These wastes contain harmful chemicals and toxins which make thewaterpoisonous for aquatic animals and plants.

Causes of Water Pollution

Water pollutionis caused due to several reasons. Here are the few major causes of water pollution:

Sewage And Waste Water:Sewage, garbage and liquid waste of households, agricultural landsand factories are discharged into lakes and rivers. These wastes contain harmful chemicals and toxins which make the water poisonous for aquatic animals and plants.

Dumping:Dumping of solid wastes and litters in water bodies causes huge problems. Litters include glass, plastic, aluminum, styrofoam etc. Different things take different amount of time to degrade in water. They affect aquatic plants and animals.

Industrial Waste:Industrial waste contains pollutants like asbestos, lead, mercury and petrochemicals which are extremely harmful to both people and environment. Industrial waste is discharged into lakes and rivers by using fresh water making the water contaminated.

Oil Pollution:Sea water gets polluted due to oil spilled from ships and tankers while traveling. The spilled oil does not dissolve in water and forms a thick sludge polluting the water.

Acid Rain:Acid rain is pollution of water caused by air pollution. When the acidic particles caused by air pollution in the atmosphere mix with water vapor, it results in acid rain.

Global Warming:Due to global warming, there is an increase in water temperature. This increase in temperature results in death of aquatic plants and animals. This also results in bleaching of coral reefs in water.

Eutrophication:Eutrophication is an increased level of nutrients in water bodies. This results in bloom of algae in water. It also depletes the oxygen in water, which negatively affects fish and other aquatic animal population.

read the question carefully

To kill the microorganisms that can harm the environment and kill the harmful bacteria in sewage pipes

yeah sure for your help

simply answer of this is to kill microorganisms

proton and neutron join together called as nucleon

a.protons and neutrons

Yes option c.) proton and neutron

please send my left questions answers please

H=I²Rt and H=(V²/R)t

option 3 is the correct answer of the given

option 3 is the correct answer

Hess's lawallows the enthalpy change (ΔH) for a reaction to be calculated even when it cannot be measured directly. This is accomplished by performing basic algebraic operations based on the chemical equations of reactions using previously determined values for the enthalpies of formation.

which option???

Use theformula∆H = m x s x ∆T to solve. Once you have m, the mass of your reactants, s, the specific heat of your product, and ∆T, the temperaturechangefrom your reaction, you are prepared to find theenthalpyof reaction. Simply plug your values into theformula∆H = m x s x ∆T and multiply to solve.

first read question carefully , then answer it

option b) hess law is related to heat of reaction at constant pressure

Atomic number z=117Number of protons=117electronic configuration is [Rn]5f¹⁴6d¹⁰7s²7p⁵Belongs to group 17-- Halogen Family11) atomic number =z=120number of protons= 120so, electronic configuration is [Uuo]8s²element belongs to group 2 ---Alkali earth family.

To know which compound has the maximum number of unpaired electrons in their 4p sub-shell. We need to check their Electronic Configuration, which are given as follows:

Electronic Configuration of element having Atomic number 33:1s22s22p63s23p64s23d104p3.

Electronic Configuration of element having Atomic number 17:1s22s22p63s23p5

Electronic Configuration of element having Atomic number 53:1s22s22p63s23p64s23d104p34p65s24d105p5.

Electronic Configuration of element having Atomic number 15:1s22s22p63s23p3.

Observation of the above given 4 E.C. tells us that the element having Atomic number 33 will have the maximum number of unpaired electrons i.e. 3

Therefore, option (1) is correct.

Correct Answer:

4l+2

Explanation:

No. of orbitals in a sub-shell =2l + 1, No. of electrons = 2(2l + 1) = 4l + 2

Activation energy, Ea= 209.5 kJ mol−1Multiply by 1000 to convert in jEa= 209500 J mol−1Temperature, T = 581 KGas constant, R = 8.314 JK−1mol−1According to Arhenious equationK = A e–Ea/RTIn this formula term e–Ea/RTrepresent the number of molecules which have energy equal or more than activation energyNumber of molecules = e–Ea/RTPlug the values we getNumber of molecules

more than ∆H , option (c)

The term Activation Energy was introduced in 1889 by Svante Arrhenius, a Swedish scientist. It is defined as the least possible amount of energy (minimum) which is required to start a reaction or the amount of energy available in a chemical system for a reaction to take place.k=Ae^-ERTwhere k is rate constant and E is activation energy.

Activation energy, inchemistry, the minimum amount of energy that is required to activateatomsormoleculesto a condition in which they can undergo chemical transformation or physical transport. Intransition-state theory, the activation energy is the difference in energy content between atoms or molecules in an activated or transition-state configuration and the corresponding atoms and molecules in their initial configuration. The activation energy is usually represented by the symbolEain mathematical expressions for such quantities as thereaction rateconstant,k=Aexp(−Ea/RT), and thediffusioncoefficient,D=Doexp(−Ea/RT)

A catalyst provides a reaction path with lower activation energy and hence increases the rate of reaction.

Acatalystprovides an alternative route for the reaction with a loweractivation energy. Itdoesnot "lower theactivation energyof the reaction". There is a subtle difference between the two statements that is easily illustrated with a simple analogy.

option D , because this is the last orbital where an electron can fall from any above orbit.. below 1s it cannot emit any thing.

E represents energy of activation.

Arrhenius' equation gives the dependence of the rate constant k of a chemical reaction on the absolute temperature T (in kelvin), where A is the pre-exponential factor (or simply the prefactor), E_a is the activation energy, and R is the Universal gas constant:

By Arrhenius equation,k=Ae^−Ea/RT

answer of this que is 3d,4s,3s,2p,1s

A reaction can have zero activation energy. Process with zero activation energy most commonly involve the combination of oppositively charged ions or the pairing up of electron in free radicals.

For ex- dimerization of nitric oxide(NO2) to N2O4 which is an odd electron molecule have zero activation energy.

For D orbital , the value of L = 2

and we know that , no. of subshell in L = 2 = (2*2+1) = 5

and each subshell contains only 2 electrons at a time

so no. of electrons in total = 2*5 = 10

Air pollutants emitted from turbine engine aircraft may have adverse effects on man.

Pollution from car exhaust, factory emissions,fuel combustion and other sources can effects plants.

Animals depends on oxygen that comes from the air and when contamination in the air occurs harmful gases are inhaled. So that the animals can get different diseases due to that they may die.

Lithium Energy Levels. Thelithiumatom has a closed n=1 shell with two electrons and then one electron outside. Since the outer electron looks inward at just one net positive charge, it could be expected to haveenergy levelsclose to those of hydrogen

Notall electrons inhabit sorbitals. At the firstenergy level, the onlyorbitalavailable to electronsisthe 1sorbital. However, at the secondlevel, therearealsoorbitalscalled 2porbitalsin addition to the 2sorbital. Unlike an sorbital,a p orbitalpoints in a particular direction.

K-2, L-8, M-18, N-32 are the required number of electrons per orbitals

The first speaker against whom a motion of non confidence was moved in the Lok Sabha was G.V. Mavalankar. Ganesh Vasudev Mavalankar

3 eletron in 3 rd orbit means it has 3 eletron in M shell so its electronic configuration is 2,8,3

right answer

Velocity at nth orbit is v= (2.165 x10⁶) x (Z/n)

actually v= (2( π²)Km(e²)Z )/(hn)

K= electrostatic constant

m= mass of electron

e= charge of electron

h= planks constant

n= nth orbit

Z= atomic number

this simplifies to the top expression

so for 3rd orbit of hydrogen

v= (2.165x 10⁶ )/ 3

v= x/3

⃗Vₙ = v₀ × z/n

Vₙ is the velocity in the nth orbit.

Z is atomic number.

V⃗₃ = v⃗₀× 1/3

V⃗₃ = x/3

7303/10000000 C answer