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प्रश्न
What are the building blocks of matter ?
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उत्तर
Atoms and molecules are the building blocks of matter.
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संबंधित प्रश्न
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
WRITE SHORT ANSWER
Define an ionic compound.
WRITE SHORT ANSWER
Name three inert gases.
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Fill in the blank
An ion with negative charge is called _______
Name the particle or particles you would expect to find in :
The orbit of an atom
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
Fill in the blank
An excess of electrons produces a ________ charge.
Write the full form of IUPAC.
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
One nm is equal to :
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of aluminium
The basic unit of matter is ______.
Define the following term with an example.
Metal
Which of the following statements made by Dalton has not undergone any change?
The graphite refill used is pencil is made of element called ______.
The smallest unit of an element is ______.
