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प्रश्न
The basic unit of matter is ______.
पर्याय
element
atom
molecule
electron
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उत्तर
The basic unit of matter is atom.
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संबंधित प्रश्न
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
Write the names of the elements present in the:-
Acetic acid
Fill in the blank
An ion with positive charge is called ______
Fill in the blank
An ion with negative charge is called _______
Define: Relative atomic mass
Who originated the word ‘atom’ ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
How is the size of an atom indicated ?
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
State true or false. If false, correct the statement.
An atom is electrically neutral.
K: Potassium:: C: ______.
The volume occupied by 4.4 g of CO2 at S.T.P ______
The number of atoms present in a molecule is called its ______.
Give the salient features of “Modern atomic theory”.
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
