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atoms are defined as the basic building blocks of matter. it is the smallest constant unit of matter that causes the properties of chemical elements. atoms does not exist independently instead they form ions and molecules which further combined in large numbers to form matter that we see, feel ,and touch

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Bellamkonda Surya Kiran 6 years, 4 months ago

Atom is a smallest unit

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Anam Khan 6 years, 4 months ago

the smallest unit of any matter is know as atom

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Bhawna Sangwan 6 years, 4 months ago

Matter is made up of very small particle called atom

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Yogita Ingle 6 years, 4 months ago

Atoms are defined as “the basic building blocks of matter”. It is the smallest constituent unit of matter that posses the properties of the chemical element. Atoms don’t exist independently, instead, they form ions and molecules which further combine in large numbers to form matter that we see, feel and touch.

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What is s block

Posted by Abhishek Pandey 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Harsh Mishra 6 years, 4 months ago

The s-block elements share electron configurations. s-block elements are the elements found in Group 1 and Group 2 on the periodic table. ... Group 2 is the alkali earth metals which have two valence electrons, filling their s sub level. Because they have 2 valence electrons they are less reactive than group 1.The s-block elements include hydrogen (H), helium (He), lithium (Li), beryllium (Be), sodium (Na), magnesium (Mg), potassium (K), calcium (Ca), rubidium (Rb), strontium (Sr), cesium (Cs), barium (Ba), francium (Fr) and radium (Ra). The periodic table shows exactly where these elements are within the s-block.

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The energy of the electron in an orbit of hydrogen atom is given by En=-1311.8/n*n

Posted by Sachin Sharma 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Maximum kinetic energy emitted photo electron when photons of wavelength 410nm falls on a metal is 2 electron volt calculate work function thres hold frequency and thres hold wavelength?

Posted by Om Dhale 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Who discovered " oganesson"i.e.(element no 118) and in which year? ??

Posted by Apurv Gautam 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Barath Balaji 6 years, 4 months ago

It was discovered by yuri oganessian in 2006

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Trike of periodic table for learn

Posted by Aditya Choudhary 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Barath Balaji 6 years, 4 months ago

No trick better read

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Trike of periodic table

Posted by Aditya Choudhary 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Robinpreet Kaur 6 years, 4 months ago

Which group . Give me group no . And 1st word of group like H,He,Li,Be,B,C...................

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Who discovered proton?

Posted by ĸʌɩf Ɗɘʜɭvi 6 years, 4 months ago

CBSE > Class 11 > Chemistry

10 answers

Khushi Anand 6 years, 4 months ago

E goldstein

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Shubhendra Singh ? 6 years, 4 months ago

Rutherford

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Robinpreet Kaur 6 years, 4 months ago

Rutherford discovred yhe protons.???

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#Aditi~ Angel???? 6 years, 4 months ago

Rutherford discovered protons @diti?

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Ashish Datir 6 years, 4 months ago

Rutherford is correct

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Vaishnavi Singh 6 years, 4 months ago

Rutherford

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Aditya Choudhary 6 years, 4 months ago

Mia

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Hemant Kumar 6 years, 4 months ago

Gold stin

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ĸʌɩf Ɗɘʜɭvi 6 years, 4 months ago

Some says Goldstein????

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Mohd Azeemushshan 6 years, 4 months ago

Rutherford

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Calculate number of atoms in 52gram of helium

Posted by Aryan Gangwar 6 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Barath Balaji 6 years, 4 months ago

Helium atom in 52g=52x6.022*10^23/4

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Yogita Ingle 6 years, 4 months ago

1 mole of He contains = 6.022 x 10²³ particles = molar mass (4 g)

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Who discovered by atom

Posted by Avnish Kumar 6 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Priyanshu Bharadwaj 6 years, 4 months ago

John Dalton

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Ayush Vishwakarma?? 6 years, 4 months ago

Democritus .

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An aromatic compound contains C 69-4 % and H =5.8 % . A 0-303 g sample of the compound was analysed for nitrogen. The ammonia evolved was absorbed in 50 mL of 0-05 (M) H2SO4, the excess of acid required 25 mL of 0 1 (M) NaOH for neutralisation. Determine the molecular formula of the compound if its molecular weight is 121. Draw two possible structures of this compound.

Posted by Saurabh Kumar 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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If 12g of metal M from give 14.8g of M3N2 on reaction what is the atomic mass of M

Posted by Vandna Sharma 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Why BeF2 is non polar?

Posted by Mandeep Mann 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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In 9f19 find value of n,l,m and s

Posted by Shukla Brother'S 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Amisha Meena 6 years, 4 months ago

N=9 L=3 M=-l to +L =-3,-2,-1,0,1,2,3 S=+-1/2,+-1/2,+-1/2,+-1/2,+-1/2,+-1/2,+-1/2

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What are supplementry units And prefixes?

Posted by Rahul Pandit 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Adhession

Posted by Abcd Pro 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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What is extrapolation

Posted by Jatin Garg???? 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

#Aditi~ Angel???? 6 years, 4 months ago

In mathematics, extrapolation is the process of estimating, beyond the original observation range, the value of a variable on the basis of its relationship with another variable @diti?

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What is spectrum

Posted by Satyam Mishra 6 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Barath Balaji 6 years, 4 months ago

Spectrum is appeared when whité light is split into 7 colours when the ray is passed thro prism in called as the spectrum of light. Spectrum is both continuois and díscon5inuo7s

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Gaurav Seth 6 years, 4 months ago

Question; Define spectrum. Give two examples of each of:
(a) narrow-spectrum antibiotics
(b) broad-spectrum antibiotics.

Answer is given below:

The complete range of micro-organisms that can be killed by a particular antibiotic is known as spectrum.
(a) Streptomycin and Chloromycetin.
(b) Tetracycline and chloroamphenicol.

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Where is the solution of supplementry material of maths class 11

Posted by Sahil Pattnaik 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Explain max planck's quantum theory.

Posted by Ayush Vishwakarma?? 6 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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Why hydrogen is kept in left side in periodic table.

Posted by Ayush Vishwakarma?? 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Barath Balaji 6 years, 4 months ago

It has been left due to its anomalous behavioir

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How many moles of methane are required to produce 22 g co2 after combustion

Posted by Harsh Supreme 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Ayush Vishwakarma?? 6 years, 4 months ago

1/2 mole of CH4 is required to produce 22g of co2.

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Why hydrogen is kept in right side of the above periodic table??.

Posted by Ayush Vishwakarma?? 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Robinpreet Kaur 6 years, 4 months ago

Wow what a answer

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Properties of s and p block..

Posted by Ayush Vishwakarma?? 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Mahi ✌?? 6 years, 4 months ago

1.S block contains elements of group 1 and 2 , 2.it electronic configuration is ns¹ and ns². 3.it have low ionization enthalpies .4.it form ionic bond .5.it have metallic character . 1.p block contains elements of group 13 to 18. 2.electronic configuration is ns²np¹ to ns²np⁶. 3.they have highly negative electron gain enthalpies. 4.they have non metallic character. They mostly form covalent bond .

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Explain why physical and chemical properties are same along the group

Posted by Adarsh Kesharwani 6 years, 4 months ago

CBSE > Class 11 > Chemistry