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Erw Trjerth asked a question
Subject: Science, asked on on 22/11/16
Draw the electron dot structure of propanal, propanone and carbon tetrachloride.
Guru Vishnu asked a question
Subject: Science, asked on on 16/1/17
Which of the following set of elements obeys Newland’s Octave rule?  (1) Na, K, Rb  (2) F, Cl, Br  (3) Be, Mg, Ca  (4) B, Al, Ga ​
Gargi Dhananjay Kulkarni asked a question
Subject: Science, asked on on 15/1/17
Neils Bohr is the scientist who prepared modern periodic table. Is it correct ?
Athira asked a question
Subject: Science, asked on on 16/9/14

zn+hcl=zncl2+h2

c+cl2=ccl4

what is its balanicng??
Vishnu asked a question
Subject: Science, asked on on 3/11/14

What Ionic bond?
Praveenkk asked a question
Subject: Science, asked on on 14/2/14

what is hydration enthalpy?
Praveenkk asked a question
Subject: Science, asked on on 14/2/14

what is polarisation capability
Praveenkk asked a question
Subject: Science, asked on on 14/2/14

what is polarisation capability?
Athira asked a question
Subject: Science, asked on on 15/9/14

give some examples for chemical equation to do formulae
Athira asked a question
Subject: Science, asked on on 16/11/14

question paper for the terminal examination
Selvan asked a question
Subject: Science, asked on on 10/4/14
In chemical reaction, one molecule of nitrogen reacts with three molecules of hydrogen to form two molecules of ammonia.if the law of conservation of mass is correct . What will be the number of atom in the product?a. N1H3b. N2H6c.N1H6d. N2H3
Saumyajeet Das asked a question
Subject: Science, asked on on 4/12/16
THE RELATIVE ATOMIC MASS OF ALUMINIUM IS 13u. EXPLAIN THE STATEMENT?
Hermoine asked a question
Subject: Science, asked on on 25/12/16
How is the atomic mass of element in decimals,although its formula is given by no of protons +no of neutrons?
Athira asked a question
Subject: Science, asked on on 14/9/14

how to draw the electronic dot structure of potttasium oxygen
Athira asked a question
Subject: Science, asked on on 13/9/14

what is ionic bond covalent bond???
Waashifa asked a question
Subject: Science, asked on on 24/9/16
write the chemical equation when magnesium is treated with very dilute nitric acid
Jaweriya asked a question
Subject: Science, asked on on 26/8/15
what are the characteristics of ionic and covalent compounds?
Priyabrata Barik asked a question
Subject: Science, asked on on 23/9/16
give reasons:-
ionic compounds are usually hard?
sodium chloride has a high melting point?
non-metals do not displace hydrogen from dilute acids/
Athira asked a question
Subject: Science, asked on on 15/9/14

give examples for chemical formulae to do..
Vaibhav Vaibhav👈✌ asked a question
Subject: Science, asked on on 5/1/17
PERIODIC TABLE SHOWING THE VARIATION IN PROPERTIES DOWN THE GROUP AND PERIOD
Jaweriya asked a question
Subject: Science, asked on on 7/9/15

what is the nature of the compound formed  between sodium and fluorine
 
Aisha Gupta asked a question
Subject: Science, asked on on 2/10/16
is it true that atomic mass is double the atomic number..because the atomic num. of helium is 2 & it mass is 4..
Sanjay Kumar asked a question
Subject: Science, asked on on 9/12/16
​why there is no place for hydrogen in modern periodic table also...?​
Nirali asked a question
Subject: Science, asked on on 7/10/16
Periodic table with atomic number,symbol and atomic mass
Sanjay Kumar asked a question
Subject: Science, asked on on 24/12/16
which of the following is not show acidic nature?
​(A)H2​CO​3   
(B)CaCO3
(C)HCl
​(D)HSO4​-
Prathamesh Patil asked a question
Subject: Science, asked on on 25/9/16
when zinc reacts with dilute nitric acid it does not produce hydrogen gas. Why
Princess Alisha asked a question
Subject: Science, asked on on 12/1/17
Draw the electron dot structure of clorine, ammonia and ethene.
Mohammed Irfan Ali asked a question
Subject: Science, asked on on 30/9/16
Can more reactive metals displace less reactive metals from their Compounds (Not Solutions) ?
Shaziya Nasir asked a question
Subject: Science, asked on on 31/10/18
Plz answer these question
Chinmay Shettar asked a question
Subject: Science, asked on on 4/12/16
saturated hydrocarbon having 7 covalent bonds
Gargii Hinduja asked a question
Subject: Science, asked on on 15/12/16

how many periods were there in mendeleev's periodic table?? in ncert it has been given 6 but in reference books , it has been given 7
Parameswaran Namboothiri asked a question
Subject: Science, asked on on 22/10/16
the mass of 1 mole electron is 
⚽... Aamina. N ...⚽ asked a question
Subject: Science, asked on on 8/10/19
What is chemical bonding???
Pls answer it........ expertsss..........
Genius asked a question
Subject: Science, asked on on 27/11/16
X- ray diffraction technique has showed that the size of sodium ion is smaller than that os chlorine ion in a sodium chloride crystsl. dut according to the periodic theory size of sodium atom is greater than chlorine altom as both belong to same period 
 
Arathy Venu asked a question
Subject: Science, asked on on 28/11/16
are functional groups except halogens present in alkanes?
Aaqil Ahamed asked a question
Subject: Science, asked on on 8/12/16
the number single covalent bonds in C4H2Br is?
Aleena asked a question
Subject: Science, asked on on 8/10/16
Which of the following is an acidic salt
A] H3PO4 B] Na3PO4 C] Na2HPO4 D] NaH2PO2
 
Samarth Singh asked a question
Subject: Science, asked on on 8/11/16
​Please explain the meaning and use of relative atomic mass. Explain why C-12 was taken for comparison .
Bhaskar Mahato asked a question
Subject: Science, asked on on 8/11/16
why chalkpowder react with copper sulphur
 
Samreen Parkar asked a question
Subject: Science, asked on on 5/10/16
what is newlands law of octave? why did he compare elements with the octaves of musical notes
M.s.sreeram asked a question
Subject: Science, asked on on 9/10/16
Please draw the bond formation of BUTANE
Pragati Gupta asked a question
Subject: Science, asked on on 6/11/16
can 2 covalent bonds be formed b/w carbon and hydrogen like , C=H
Andrea asked a question
Subject: Science, asked on on 2/12/16
10. Identify the following:
a. an element with four electrons in its M shell
b.Element with half as many electrons in the fourth shell as compared to the third shell
c. an alkali metal
d. lightest metalloid
Samish Gundewar asked a question
Subject: Science, asked on on 17/9/16
Why is that non-metals do not displace hydrogen from dilute acids?Pls explain
Preethika asked a question
Subject: Science, asked on on 8/10/16
why H2 is not evolved when metals react with dilute HNO​3?
Siddhant Mundhe asked a question
Subject: Science, asked on on 4/11/16
what are negetive catalyst explain briefly with related to carbon and carbon with help of examples
Sameer Kumar asked a question
Subject: Science, asked on on 15/1/17
What are the ​features of modern periodic table. Please quikly as possible.
Hema asked a question
Subject: Science, asked on on 7/12/16
name any 1 alternate forms of periodic table and  give its characteristics briefly?
 
Khushi asked a question
Subject: Science, asked on on 12/12/16
 give me as many as questions possible for carbon and its compound, light and how do organisms reproduce please
Ritu..... asked a question
Subject: Science, asked on on 6/12/16
draw a structure of pentenal
 
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