Advertisements
Advertisements
प्रश्न
Is it possible to see atoms these days ? Explain your answer.
Advertisements
उत्तर
Yes, it is possible to see atoms these days, with the help of advanced technology. Electronic microscopes are extremely powerful and can magnify even the smallest particle. A Scanning Tunnelling Microscope (STM) can be used to produce highly magnified images of the surface of elements on a computer screen. Therefore, a highly sophisticated STM can be used to view atoms indirectly.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
ANSWER IN DETAIL
How are isobars different from isotopes ?
Name the particles which revolve around the nucleus.
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.
Name the particle or particles you would expect to find in :
The nucleus of an atom
Draw the electron dot structure of this compound.
Name the gas that.
Turns moist starch iodide paper blue black.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
The basic unit of matter is ______.
State true or false. If false, correct the statement.
An atom is electrically neutral.
Draw the structure of an atom and explain the position of the sub-atomic particles.
Define the following term with an example.
Compound
Define the following term with an example.
Metal
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
______ is a substance that is made up of three oxygen atoms chemically combined.
What is the fundamental particle of an element?
