How is the size of an atom indicated?

Academic Chemistry NCERT Class 9

The size of an atom is indicated by its radius known as 'atomic radius'.

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Updated on: 10-Oct-2022

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Give the unit to measure the size of an atom and give the size of the hydrogen atom.
Measurement Size of Atom Avogadro
On the basis of Thomson’s model of an atom, explain how the atom is neutral as a whole.
On the basis of Rutherford’s model of an atom, which sub-atomic particle is present in the nucleus of an atom?
What is a mole of an atom?
(a) Describe Bohr's model of the atom. How did Neils Bohr explain the stability of atom?(b) An element has an atomic number of 11 and its mass number is 23. What is the arrangement of electrons in the shells? State nuclear composition of an atom of the element.
If the number of electrons in an atom is 8 and number of protons is also 8, then(i) What is the atomic number of the atom? and(ii) What is the charge on the atom?
What is the maximum number of electrons which can be accommodated in the :(a) innermost shell of an atom?(b) outermost shell of an atom?
An atom of an element X may be written as 94X.(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.
Name the unit in which the radius of an atom is usually expressed.
What is the positive charge on the nucleus of an atom due to?
(a) What is the nucleus of an atom and what is the nature of charge on it?(b) Name the scientist who discovered the nucleus of atom.
Which of the following statement is always correct?(a) an atom has equal number of electrons and protons (b) an atom has equal number of electrons and neutrons (c) an atom has equal number of protons and neutrons (d) an atom has equal number of electrons, protons and neutrons
What is the size of an object of an empty class in C++?
What is the maximum number of electrons an M shell of the atom can accommodate?

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