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Atomic number of the element =16

Electronic configuration = 2, 8, 6

Period number = Number of shells in it. The atom of the element has three shells. So, the period number is 3.

The atom of the element has six valence electrons. So, the group number of the element will be 16 (6 + 10).

Valency = 8 - number of valence electrons in outermost shellValency = 8 - 6 = 2

Sulphur is non metal

Block = p

Atomic number is 10 hence number of protons will be 10

Electrons will be 10 and as 10*2=20 is the mass number hence neutrons will be 10

Electronic configuration 1s^2 2s^2 2p^6

Solving the marked questionsa)1)as number of protons=atomic numberhence 7 protons -E2)Configuration is 2,7 hence 2+7=9-Bb)In atom A and BA-In number of nucleons as atomic number is 20 hence 20 neutrons 20 protonsB-atomic number is 9hence 9 protons and 9 neutrons

Answer 1. E will contain 7 protons because the atomic number and protons are always same.

Answer II. Atom B has the electronic configuration 2.7Easy way to do just add 2+7 which is 9

half of a answar only u give

Initially the total mole no hydrogen and nitrogen is =4,And finally the total mole no of ammonia is =2,So the initial and final volume ratio would be =2:1

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Sigma 1s2 sigma1 1s*2 sigma2s2 sigma 2s*2 pi 2pz2 (assuming intermolecular axis be z) nd pi2py 1 nd pi2px1

Given :Mass number of element is 35Number of neutrons= 18

Formula to find number of protons: Mass number = number of protons + number of neutrons.35=× +18×=35 - 18X=17.Number of protons =17 and number of electrons also will be 17 as atom is electrically neutral.

Hence Element is chlorine

Electronic configuraton:1s2 2s2 2p6 3s2 3p5

Group number= 17Period number =3Valency =1

the sodium electron configuration will be 1s22s22p63s1.

first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for sodium go in the 2s orbital.The next six electrons will go in the 2p orbital. The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the remaining electron in the 3s.

In writing the electron configuration for sodium the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for sodium go in the 2s orbital. The nex six electrons will go in the 2p orbital. The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the remaining electron in the 3s. Therefore the sodium electron configuration will be 1s22s22p63s1

Answer:c) methaneExplanation:

Atmosphericmethaneconcentrations are of interest because it is one of the most potent greenhouse gases in Earth's atmosphere. Atmosphericmethaneis rising. The 100-yearglobal warmingpotential ofmethaneis 28. Early in the Earth's history carbon dioxide andmethanelikely produced a greenhouse effect.

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Urea has the highest nitrogen content of all solid nitrogenous fertilizers in common use. More than 90% of world industrial production of urea is destined for use as a nitrogen-release fertilizer. Urea is made up of 46% nitrogen and is more widely available than calcium ammonium nitrate (CAN) internationally.

Urea is an extremely mobile substance in soils because of its negative charge and is a major cause of water pollution from agriculture. It is readily absorbed by plants, and is the dominant source of nitrogen for plant growth. Urea is used in many multi-component solid fertilizer formulations and is highly soluble in water.

Urea is usually spread at rates of between 40 and 300 kg/ha but rates vary. Urea is not compatible with other fertilizers. In irrigated crops, urea can be applied dry to the soil, or dissolved and applied through the irrigation water. As the N rate increases the percentage of NH3 loss from urea increases. Urea is susceptible to ammonia (NH3) loss during its conversion to ammonium-N.

a)Look toward the south-southeast to find Sirius in winter in the Northern Hemisphere.

Locate the constellation of Orion, particularly the three stars of Orion’s belt. Focus in on the leftmost star of the belt.

Hold your right arm out straight with the right edge of your fist adjacent to where you see the leftmost star. Rotate your fist diagonally so it continues the left-and-downward slant of the belt. According to Space.com, one fist equals about 10 degrees of sky when held out at arm’s length.

Place your left fist next to your right, also diagonally. Sirius should be at the left edge of your left fist.

b)

The North Star, also known as Polaris, is often used by campers to help them find their way when lost. You may also just want to find the North Star for fun if you're into star gazing. You can rely on constellations in the night sky to find the North Star. As most constellations you'll need to use are in the northern sky, you'll need to figure out which direction is north first. If you do not have a compass, you can rely on signs from nature to figure out whether or not you're facing north.

hello ye (a) answer main fist ya first

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Reita Faria Powell(born 23 August 1943) born to Goan parents inBritishBombay (now Mumbai) is an Indian model, doctor and beauty pageant titleholder who won the Miss World title in the year 1966, making her the first Asian woman to win the event. She is also the first Miss World winner to qualify as a Doctor.

Sushmita sen is the first indian woman of Miss Universe

hot kmno4 In basic solution the purple permanganate anion is reduced to the green manganate ion, providing a nice color test for the double bond functional group. From the mechanism shown here we would expect syn-stereoselectivity in the bonding to oxygen, and regioselectivity is not an issue.

The equation for the reaction between PbO and HCl is as follows:

PbO + 2HCl------------> PbCl2 + Cl + H2O

Therefore 1 moles of PbO require 2 moles of HCl to give 1 mole of PbCl2.

Calculate the reagent, between HCl and PbO, that is the limiting reagent.

Pb-207.2 Cl-35.5 O-16 H-1

moles=mass/molar mass

moles of PbO = 6.5/(207+16) = 6.5/223.2 = 0.029148

if 1 mole = 2 moles of HCl

then 0.029148= 2x0.029148= 0.058296

moles of HCl= 3.2/(1+35.5) = 3.2/36.5 = 0.08767

if 2 moles of HCl= 1 mole of PbO

then 0.08767= 1x 0.8767/2 = 0.04384

Therefore PbO is the limiting reagent.

Calculate moles of PbCl2 produced as follows:

if 1 mole of PbO = 1 mole of PbCl2

then 0.029148 will give= 1 x 0.029148 moles

Therefore moles of PbCl2 produced = 0.029148 moles

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Arsenic (As) has five and Silicon (Si) has four valence electrons in their respective outermost shell. When Si is doped with As, four electron of As forms covalent bond with the four electrons of Si while one electron remains free for conduction. N- type of semiconductor is denoted by positive ion and free electron. Therefore, n-type of semiconductor is formed when Si is doped with As or any other pentavalent atom.

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All are posting sin tan sums

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5/40*450 and multiply by 1000 answer is

A reaction in which two or more reactants combine together to form a single product.Example : C + O2 → CO2

Ans :- Covalent hydridesareformed when hydrogen reactswith the p-block nonmetalsby sharing its electrons. Relativeto hydrogen's reactionwith other elements,hydrogen canreadily reactwith nitrogen, oxygen, and halogens because theyarevery electronegative, thereforereactive.

By the technique of crystallization, pure solids are separated from impurities. For example, salt obtained from sea is separated from impurities; crystals of alum (Phitkari) are separated from impure samples.

By the technique of crystallization, pure solids are separated from impurities. For example, salt obtained from sea is separated from impurities; crystals of alum (Phitkari) are separated from impure samples.

Is O2 =16×2= 32 g ?

Unit cells cluster together to form crystals in a process called crystallization.

moles of H2 = 10/2 = 5moles of O2 = 64/32 = 2

now , 2H2 + O2 → 2H2O

so, molee of H2O , will be twice the moles of O2 , because O2 is limiting reagent

so, moles of H2O = 2*2 = 4 mol

lSince the dilute mineral acid is not given, we will use the hydrogen ions:

Equation:

Mg + 2H^+ -----> Mg (ions) + H2(s) (aq) (s/aq) (g)

ratio of moles of Mg: H2 = 1:1

moles of magnesium ions: moles= mass/molar mass 12/24 =0.5 moles

if ratio = 1:1 then moles of hydrogen gas produced = 0.5 moles

The question requires amount of hydrogen gas:Mass= moles x molar mass =0.5 x 2 =1 gTherefore 1 g of hydrogen gas is produced.

option 1) Robert Hill

The absolute pressure exerted by a given mass of anideal gasis inversely proportional to the volume it occupies if thetemperatureandamount of gasremain unchanged within aclosed system.

36g H20 contains = 36/18 = 2 moles of H20

and the reaction pf electrolysis is

2H2O → 2H2 +O2

so, when 2 mol of H2O will be electrolysd , then 2 moles of H2 and 1 mole of O2 will be evolved

so, total volume will be (2+1)*(22.4) = 67.2 L

option d

36g H20 contains = 36/18 = 2 moles of H20

and the reaction pf electrolysis is

2H2O → 2H2 +O2

so, when 2 mol of H2O will be electrolysd , then 2 moles of H2 and 1 mole of O2 will be evolved

so, total volume will be (2+1)*(22.4) = 67.2 L

option d

I want to will an engineer

this right answer B) hydrogen bonded molecular

hydrogen bonding to water

hydrogen bonds in water

a)sponge though compressible is a solid because sponge has many tiny pores inside it which we sometimes used to absorb a liquid or water. this tiny pores inside the sponge creates a hollow space thus making it compressibleb)gases completely fill the vessel in which they are kept because, gases does not have any fixed shape, it retains the size of the vessel in which it is kept,and gas particles always ar in motion

a) A sponge has minute holes in which air is trapped when we press it the air is expelled out and we are able to compress it.

b) This happens because of the fast diffusion of the particles in a gas. The number of vacant spaces or voids in the gaseous state is very large . This means that the particles in a gas move at a very fast speed . they readily fill completely the vessel in which it is kept. This the volume of the gas is same as that of the vessel

(a)A sponge has minute holes in which air is trapped. On applying pressure/ force , the air is expelled out and the sponge gets compressed . On releasing pressure, sponge regains its shape . Thus, sponge is classified as a solid .

(b) In the gaseous state , particles have more kinetic energy and thus particles move freely and have greater space between them.Therefore , particles occupy the entire space available. Hence ,gases completely fill the vessel in which they are kept .

Southernis the brand name used by theGovia Thameslink Railway(GTR) train operating company on the Southern routes of theThameslink, Southern and Great Northernfranchise in England.

the weight will also become on third because the mass will be unchanged but the acceleration due to gravity will only be reduced to one third to that on Earth.so it's weight will be 512/3=170.66 N

In exhaustive methylation, With asymmetrical amines, the major alkene product is the least substituted and generally the least stable, an observation known as theHofmann rule.

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