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Rishav Shaw asked a question
Subject: Chemistry, asked on on 15/9/15
if u can provide me with a chart of valency
Ankur Ravindra Kushwaha asked a question
Subject: Chemistry, asked on on 13/5/13

explain rutherford's gold foil experiment, his observations and the conclusions drawn by him from these observations.
Anish Bansal asked a question
Subject: Chemistry, asked on on 10/4/13

WAT IS THE MEANING OF CHARGE TO MASS RATIO OR E/M ? ALSO  EXPLAIN CHARGE AND MASS RATIO DIFFRENTLY AND THEIR VALUES? PLZ EXPLAIN IN DETAIL AS I AM MUCH CONFUSED? ANS FAST....
Ansuman Panda asked a question
Subject: Chemistry, asked on on 6/7/15
Why do most of elements form ions while entering into a chemical reactions?
Surbhi Pardeshi asked a question
Subject: Chemistry, asked on on 23/7/14

What is parmanu?
Nitin asked a question
Subject: Chemistry, asked on on 6/7/15
Representation of the following a proton 'p' electron 'e' a neutron 'n' in terms of its symbol showing the subscript and superscript value
Suresh asked a question
Subject: Chemistry, asked on on 18/10/16
the wave number of the H-alpha line in balmer series of hydrogen spectrum is
1)  5R/36
2) 3R/36
3) 21R/100
4) 3R/4
Manty asked a question
Subject: Chemistry, asked on on 28/5/19
Electronic configuration of copper is (2,8,18,1). Due to one atom in the last shell another electron is added at the last shell and the electronic configuration becomes (2,8,17,2) but the atomic structure remains (2,8,18,1). Why does this happen?Why the atomic structure does not have two electrons in the last shell?? Please answer this..
Rahoul Banerjee Ghosh asked a question
Subject: Chemistry, asked on on 3/7/16
Which elements follow the duplet rule?
Rahul asked a question
Subject: Chemistry, asked on on 18/4/13

 Atoms are building blocks of matter  and neutral in character.Elaborate this line.
Neeraj asked a question
Subject: Chemistry, asked on on 28/4/13

in which part of the atom do the protons ,electrons ,neutrons exist
Pranav Veena asked a question
Subject: Chemistry, asked on on 10/5/14

why should there be(in canal ray experiment):

1)air at low pressure

2)glow

3)perforated cathode(what is a perforated cathode?)

thank you
Sukhpuneet asked a question
Subject: Chemistry, asked on on 25/6/13

 how to find the valency of iron with bohr-bury rule?
Anurag Singh asked a question
Subject: Chemistry, asked on on 9/4/13

can experts make a video of how ionic, covalent ,double convalent bonds are formed. Please
Aditya Abraham asked a question
Subject: Chemistry, asked on on 30/5/14

write a explanatory note on nuclear fission with atom bomb and give related reactions.
Sanjani asked a question
Subject: Chemistry, asked on on 5/6/17
From the elements He,Br,Pt and O;the element which forms a polyatomic molecule is _and which is liquid at room temperature is_
Kakon Ghosh Moulick asked a question
Subject: Chemistry, asked on on 16/7/14

Why electrophoresis is shown by certain type of solution?
Manit Mittal asked a question
Subject: Chemistry, asked on on 25/10/14
For an element with atomic number 19,the 19th electron will occupy :-

a. L shell
b. M shell
c. N shell
d. K shell
Sukhpuneet asked a question
Subject: Chemistry, asked on on 2/7/13

How to derive the chemical formula of carbon dioxide?
Jyotsna Tiwary asked a question
Subject: Chemistry, asked on on 17/1/14

give reasons

  1. an ebonite rod gets negatively charged wen rubbed with fur.
  2. a glass rod positively charged when rubbrd with piece of silk.
M.prudhvi asked a question
Subject: Chemistry, asked on on 15/8/13

How Neil's Bohr corrected Rutherford model of atom
Nitin asked a question
Subject: Chemistry, asked on on 5/7/15
What is the mass number of the atom having 20 neutrons and 15 protons ?
Dipayan Basu asked a question
Subject: Chemistry, asked on on 24/6/13

as per the rule 2n square, the max no of electron in the 'M' shell is 18, but in Ca, the config is 2,8,8,2. Why not 2,8,10 considering M shell can accomodate upto max 18 electrons
Riya asked a question
Subject: Chemistry, asked on on 28/6/14

what are the various components of a nuclear power plant?
Syed Malikkul asked a question
Subject: Chemistry, asked on on 1/2/14

rubber formula
Sukhpuneet asked a question
Subject: Chemistry, asked on on 27/6/13

How much is the mass of a proton and a neutron?Is the mass of proton and neutron same for atoms of all elements?PLEASE EXPLAIN..
Mihir Bagchi asked a question
Subject: Chemistry, asked on on 24/5/13

Make a Project on allotropes of various compounds (using ball & stick). It
should cover the following headings: a. structure of allotropes, b. preparation
and properties, c. uses .Make clay model of elements configuration
Md Aayan Ali asked a question
Subject: Chemistry, asked on on 23/4/17
what qualitative information is given by the formula hcl
Adya Mehrotra asked a question
Subject: Chemistry, asked on on 7/5/17
Two substances which donot change their state by heating
Sukhpuneet asked a question
Subject: Chemistry, asked on on 25/6/13

 Please explain excitation and de excitation briefly,

I am not able to understand its units which you have given in picture of excitation..please answer fast
Sharvil Joshi asked a question
Subject: Chemistry, asked on on 1/6/15
How does the existence of isotopes contradict Dalton' s theory?
Md Nasiruddin asked a question
Subject: Chemistry, asked on on 1/10/15
what is apple pie pudding model of atom?
Md Aayan Ali asked a question
Subject: Chemistry, asked on on 29/4/17
name the nucleons present within the nucleus of an atom and state their mass and charge
Yanvi Joshi asked a question
Subject: Chemistry, asked on on 2/9/17
tell me the atomic masses of the elements from 1 to 20
Anand Sawarna & 1 other asked a question
Subject: Chemistry, asked on on 4/9/13

what are radioactive substances ? give two examples.
Rohnak asked a question
Subject: Chemistry, asked on on 17/7/15
If an ion of an element has 2 positive charges , the mass no. of the atom is 24 and the no. of neutron is 12. State the no. of electrons in the ion ?
Pradeep Nithianantha asked a question
Subject: Chemistry, asked on on 1/10/13

what is plum pudding model of an atom?
Sukhpuneet asked a question
Subject: Chemistry, asked on on 27/6/13

 Electrons revolve around the neucleus or not?EXPLAIN,,,If yes then they radiate energy or not?ANS FAST//
Sukhpuneet asked a question
Subject: Chemistry, asked on on 27/6/13

Alpha particle beam is positively charged or negatively?why does it deflect only on touching the neucleus of atom?PLEASE EXPLAIN
Shreya Chatterjee asked a question
Subject: Chemistry, asked on on 16/7/13

i have to make a chemistry model. please help me out.
Kritidipa Sadhu asked a question
Subject: Chemistry, asked on on 17/8/13

Why after knowing that John Dalton's atomic theory was wrong, it is given so much importance????
Diwan asked a question
Subject: Chemistry, asked on on 27/11/13

atom and molecules
Nilay Rakesh asked a question
Subject: Chemistry, asked on on 24/5/13

explain rutherford's and thompson's model of atoms
Sukhpuneet asked a question
Subject: Chemistry, asked on on 23/6/13

Chemical reaction between 8 gm of nacl and 5.3gm of AgNo3 is carried out in a closed vessel. After the reaction gets completed mass of Agcl formed will be________________gm if mass of NaNO3 formed is 9.1..

Please answer it and explain..
Sukhpuneet asked a question
Subject: Chemistry, asked on on 2/7/13

If the mass of protons is same for the atoms of all elements,then why e/m of the positively charged particles in anode rays differ from gas to gas?
Md Aayan Ali asked a question
Subject: Chemistry, asked on on 23/4/17
what qualitative and quantitative information is conveyed by a symbol
Sukhpuneet asked a question
Subject: Chemistry, asked on on 26/6/13

how much is the mass of proton and neutron
Priyal Sharma asked a question
Subject: Chemistry, asked on on 16/2/15
The monomer of natural rubber.
Kartik Melwani asked a question
Subject: Chemistry, asked on on 24/9/13

different between atomic number and mass number ?
Selina Mishra asked a question
Subject: Chemistry, asked on on 17/6/13

 Is Atomic Weight and Mass number same ? Or there is some difference ?
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