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प्रश्न
Write any two observations which support the fact that atoms are divisible.
उत्तर
With the discovery of electrons and protons it was established that atom is divisible and is made up of negatively charged electrons and positively charged protons along with some neutral particles called neutrons.
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संबंधित प्रश्न
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
Write the names of the elements present in the :-
Sulphuric acid
Give the charge and the mass of an electron, proton and neutron present in an atom ?
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
Fill in the blank
A deficiency of electrons produces a ________ charge.
Name the unit in which the radius of an atom is usually expressed.
Write the relation between nanometre and metre.
What value has been given to the mass of this reference atom ?
One nm is equal to :
The electron shell ______ is nearest to the nucleus.
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Name the gas that.
Turns moist starch iodide paper blue black.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
The smaller particles found in the atom is called ______.
Define – Atom.
In all atoms of an element
Atoms of different elements having the same number of ______ are called isotones.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
Lead is also known as plumbum.
Atoms have a radius of the order ______.
