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प्रश्न
What is the contribution of the following in atomic structure?
Democritus
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उत्तर
Democritus called paramanu as atom which comes from the Greek word atomos, meaning indivisible.
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संबंधित प्रश्न
Fill in the blank.
___________ single covalent bonds are formed between the carbon and chlorine atoms.
Element X is a metal with a valency 2. Element Y is a non metal with a valency 3.
(a) Write equations to show how X and Y form ions.
(b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2,8,1 |
2,8,7 |
2,5 |
1 |
Answer the following questions based on the table above:
What is the formula of the compound formed between X and Z.
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is
State one observation which shows that atom is not indivisible.
What do you think would be the observation of `alpha` particle scattering experiment if carried out on (i) heavy nucleus like platinum (ii) light nuclei like litheum.
Explain fractional atomic mass. What is the fractional mass of chlorine?
Identify the following reaction as either oxidation or reduction:
Zn → Zn2+ + 2e-
Number of valence electrons in carbon is ______.
The element that would form cation due to the loss of electrons during the chemical reaction is ______.
