write 5-6 differences between isobars and isotopes in a tabular form .
how to find valency of an element?
what were the drawbacks of thomson model of atom
Calculate the number of molecules in 8g of Oxygen ?
find the valency of sulphur .[atomic no.=16
what are canal rays ?
5 examples of isotopes and 5 examples of isobars
What is the valency of copper?
EXPLAIN THE LAW OF CONSERVATION OF MASS WITH AN EXAMPLE ?
the properties of electrons, protons and neutrons.
what are the application of isotopes
What are the drawbacks of Rutherfords atomic model?
difference between electrons protons and neutrons...also find the relation between the three
Q.1. How many molecules are present in
(a) 9 grams of water
(b) 17 grams of amonia
Q.2. Calculate the number of moles in 17 grams of H2O2
Q.3. Show that 12 grams of carbon-12 contains 6.023 x 1023 atoms of 12C
Q.4. What is the mass of one atom of hydrogen ?
Q.5. How many moles of Mg atoms are there in 100 grams of magnesium ?
Q.6. Neon gas consist of single atoms. What mass of neon contains 6.023 x 1023 atoms ?
Who discovered proton? Golstein or Rutherford?
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