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By knowing the value of valent shell we can find that if the element can lose or GAIN the electrons easily.If it can lose electrons for ex- in case of SODIUM there are 1 electron in it's valent shell hence it BECOME EASY for it to lose the electron therefore , it is a metal .Whereas , when the element can gain the electron easily for e.g chlorine have 7 electrons in it's VALENCE shell therefore it become easy for the chlorine to gain an electron to become balance hence it is non - metal..
hope I answered satisfactorily .....

No.

Chlorine is smaller than sulphur because: 
1. the effective NUCLEAR charge of chlorine is larger. 
2. chlorine has LESS unpaired electrons. 
3. chlorine’s electrons screen more effectively. 
4. the two elements are in the same ROW. 
5. none of the other options

The middle HALOGENS, chlorine, bromine and IODINE, are often used as disinfectants. All of thehalogens are toxic. All of thehalogens react (F, Cl, Br EXPLOSIVELY) with HYDROGEN to form hydrogen HALIDES (e.g. HF, HCl, HBr, HI) and all forms acid wihen mixed with water.

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Limitations of VSEPR theory:

VSEPR Theory fails to explain isoelectronic species. Isoelectronic species REFERS to the elements that have same number of ELECTRONS. According to VSEPR theory, a shape of the molecule depends on the number of bond pair and a LONE pair (valence electrons).But, isoelectronic species can differ in the shape even if they have a same number of electrons.

VSEPR Theory does not explain the transition metal compounds. The VSEPR model fails to guess the structure of certain compounds. The reason being that it does not take ASSOCIATED sizes of the substituent’s and inactive lone pairs into account.

It is found GROUP 2 of the periodic table.
(Note-Group 2 elements are alkaline in nature and are known as alkaline EARTH metals.)
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Hope it HELPS.

1) If a substance X on heating gives two different SUBSTANCES Y and Z, then the substance is a compound and not an ELEMENT. Both elements and compounds are pure substances. However, an element is composed of only one type of particles, while a compound consists of two or more atoms of different elements, combined in a fixed ratio by mass. For example carbon is an element composed of only carbon atoms while NaHCO3, CaCO3 are compounds composed of atoms of more that one element. Hence if we are obtaining two substances by heating substance X, it means that the X itself is composed of two different types of atoms. Thus X is a compound.
2) Elements are the pure substances which consists of only one type of particles. These particles can be atoms or molecules. For example Carbon is made up of only carbon atoms, Hydrogen GAS consists of Hydrogen molecules (formed from two atoms of Hydrogen) etc.
A compound on the other HAND, is a pure substance which consists of two or more atoms of different elements, combined in a fixed ratio by mass. ALSO the properties of a compound are entirely different from that of the combining elements. Some examples of compound include water (formed from atoms of two elements-oxygen and hydrogen), sodium chloride (formed from sodium and chlorine), ammonia etc.

From what I've read about heat, temperature and CONDUCTIVITY, I understand that the REASON water at room temperature feels colder than most other things at the same temperature (like wood, AIR, cotton) is because of its higher thermal conductivity. That is, it transfers heat quickly from my BODY to itself, as well as within itself.

(Assuming the thermal conductivity is the only reason why different materials feel colder or warmer), what I don't understand is why metals feel about as cold as water, while their thermal conductivities are 100-to-200 times higher than that of water(Water's is ~0.58 W/mK, the values for metals RANGE from 50 to 400).

I THINK its BENZENE methaone..

Hey frnd...
ISOTOPES are those in which the atoms has same atomic number i.e same no of protons but different NEUTRONS.
for example --- Carbon 12 and Carbon 14 are both isotopes of carbon, one with 6 neutrons and one with 8 neutrons (both with 6 protons). 

ISOBARS are those in which atoms have same atomic mass.
for example---An example of a SERIES of isobars WOULD be40S, 40Cl, 40Ar, 40K, and 40Ca.


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Your PICTURE is not CLEAR

Ethanol FORMS COVALENT bonds that is they share valence electrons

Magnisium chloride forms IONIC bonds that is they gain and lose electrons.

so what U WANT to ASK.....

MAKE IT CLEAR !

The chemical basis for Markovnikov's Rule is the formation of the most STABLE carbocation during the addition process. The addition of the hydrogen ion to ONE carbon atom in the alkene creates a positive charge on the other carbon, FORMING a carbocation INTERMEDIATE

This is how you CRACK it up;

Molarity=NUMBER of MOLES/volume of solution

since we do not have the number of moles, but INSTEAD we have the mass

We SAY: Number of moles= mass/molar mass

∴No of moles=20.7g/138.205g/mol

                     = 0.149mol

∴molarity=0.149mol/500mL

molarity= 0.000298mol/mL or (0.000298M)

: The MOLAR mass of ammonium sulfate is 132.13952 g/mol. HOPE this is HELPFUL to you..
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So what do you WANT to ASK?

44 gram of CO2 EQUAL to one MOLE
No of O2=2 mole of o2

SP2 hybridisation

i HOPE it will HELP U

USES of Noble Gases in Daily Life. ... Helium is used to dilute the oxygen gas in deep-sea divers' gas tanks as it is less soluble in blood at high pressure. Argon gas is MAINLY filled in light BULBS to create inert atmosphere so that the METALLIC filament does not react with atmospheric oxygen at high temperature.

In the presence of H2SO4 CONCENTRATED sulphuric acid, ACETIC acid reacts with ETHYL alcohol to PRODUCE

The evolution in the understanding of the recrystallization phenomena is summarized in this paper. Initially the main DEVELOPMENTS concerning recrystallization are presented from a historical PERSPECTIVE. Definitions and concepts involving recrystallization are presented regarding it as a solid-state reaction that occurs by nucleation and growth. The recrystallization nucleation mechanisms are subsequently discussed. FINALLY, the growth step is highlighted, emphasizing boundary and sub-boundary MOBILITIES and the forces acting on the high angle grain BOUNDARIES that sweep the microstructure during recrystallization.
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It is a form of BONE OIL, a product obtained in the MANUFACTURE of bone-black, or animal CHARCOAL, by the distillation of BONES.

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A chemical reaction which is accompanied by the evolution of heat is called exothermic reaction.

A reaction in which heat is generated is called exothermic reaction.The term EXO means release and thermo means heat.
It GIVES net energy to its surrounding.
Calorimeter is a device which is used to measure total amount of heat that flows, in the exothermic reaction it is negative value.

For example=Burning or combustion of natural gas(CH4) or LPG (C4H10), respiration etc.

1) CH4 + 2O2 -----------> CO2 + 2H2O + Heat

✌️Hope it helps you ✌️
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Noooooooooooooooooooook

HEY DUDE,

ENTHALPY of any superheated point is equal to enthalpy of saturated vapor point plus enthalpy change during given degree of superheat.

have a nice day....

The BASIC difference between saturated and unsaturated compound is that saturated compounds have SINGLE BOND while unsaturated compounds have double or TRIPLE bond.

1) GROUNDWATER is the waterpresent beneath EARTH's SURFACE in soil pore spaces and in the fractures of rock formations
2) The clear LIQUID which PASSES through the filter paper is called the filtrate.

AgNO3(AQUEOUS) + KCl(aqueous) —–AgCl(PRECIPITATE) + KNO3(aqueous)

In the above reaction, a white precipitate called as silver chloride or AgCl is formed which is in a solid state. This solid silver chloride is insoluble in water. Precipitation REACTIONS help in determining the presence of DIFFERENT ions present ina particular solution

2KOH(aqueous) + CaCl2(aqueous)—-Ca(OH)2(aqueous) + 2KCl(aqueous)

resulting in the formation of an insoluble salt Called calcium hydroxide.

AgNO3(aqueous) + NaCl(aqueous) —- AgCl↓ + NaNO3 (aqueous)

Mg(OH)2(s) + 2HCL (aqueous) ——— MgCl2(aqueous) + 2H2O(l)

The PRODUCT when METAL REACTS with NON metal is SALT

Dear STUDENT,

Please find below the solution to the asked query :
We know that VOLUME = base area x height
So height
h =13400670=20 cmNow TSAof BOX = 2[lb+bh+hl]Now here we know h but we dont know l, b so but we can factorize l×b = 670 , to get at least one possible value of l and b l×b = 67×10 So l = 67 and b = 10 Now putting this we get TSAof box = 2[670+200+1340] = 4420 square cm

Hope this would clear your doubt about the topic.

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Haloarenes are less reactive TOWARDS because in haloarenes benzene undergoes resonance as a result C-X BOND ACQUIRES partial double bond character so that ,,,
it brcomes difficult to BREAK C-X bond

Another example of a redox reaction is the formation of HYDROGEN FLUORIDE. We can break the reaction down to analyze the oxidation and reduction of REACTANTS. The hydrogen is oxidizedand loses two electrons, so each hydrogenbecomes positive. The two electrons are gained by FLUORINE, which is reduced.

A SOLUTION consists of two or more substances dissolved in a liquid form. Not to get CONFUSED with a MIXTURE, which is heterogeneous--multiple substances EXIST in varying structures-- solutions are homogenous, which means that atoms of the solute are evenly dispersed throughout the SOLVENT (ex. water, ethanol).

In the SN2 mechanism, the reactivity of halides for the same ALKYL group increases in the order. This happens because as the size increases, the halide ion becomes a better LEAVING group.
R−F << R−Cl < R−Br < R−I
Therefore, CH3I will react FASTER than CH3BR in SN2 reactions with OH.

(3) The greenhouse GAS emissions from both COAL and natural gas are .... The USE of fossil FUELS causes environmental damage. This is ...... Fossil fuel combined CYCLE power system.

It MAY be CHLORINE i THINK...

HOPE it HELPS

The ORDER of REACTION is THIRD order