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Atoms and molecules
Structure of atom
Matter in our surroundings
Is matter around us is pure
Periodic table
100
Each element has a name and a unique chemical symbol.
What do each element have?
100
It is Valency
What is the combining capacity of an atom?
100
It is the property of matter which signifies least change in volume or shape.
What is mean by rigidity?
100
% concentration of solution=mass of solute/mass of solution*100.
How do we express concentration of a solution?
100
symbol-(W)
What is the symbol of tungsten?
200
It is composed of two or more elements chemically combined in definite proportions.
What is mean by compound?
200
It is 2,8,4
What is the electronic configuration of silicon?
200
Gaseous molecules have lot of empty space between them.
Why gases are compressive but not liquids?
200
A solution in which no more of the solid (solute) can be dissolved at a given temperature.
What is mean by saturated solution?
200
Albert Einstein
Who found the element Einsteinium?
300
Individual atoms of most elements do not exist independently.
How do atoms exist?
300
It was founded by James chad wick.
Who is the founder of neutron?
300
Alcohol is more volatile
Out of water and alcohol which is more volatile?
300
It has visible boundaries of separation between the various constituents.
What is mean by heterogeneous mixture?
300
They are noble gases.
What are the this following elements called? a) neon b) argon c) krypton d) radon e) xenon
400
Compounds containing charged species are known as ionic compounds.
What are ionic compounds?
400
It was proposed by Rutherford.
Who proposed scattering experiment of alpha particles?
400
Below a certain temperature, gases can be liquefied by increasing pressure.
How can the gases be liquefied?
400
1) purification of impure substances. 2) recovery of salt from sea water. This are the applications
what is applications of crystallization?
400
The atomic number is 50
What is the atomic number of Tin?
500
An atom is a building block of element.
What is an atom?
500
It is used in nuclear fission.
Where is uranium - 235 used?
500
It is a property of matter by which one substance gets mixed with one other.This arises due to the movement of particles of matter.
What is mean by diffusion?
500
An element is a substance which contains atoms all of the same kind.
What is mean element?
500
The atomic mass number is 16
What is atomic mass number of Oxygen?