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प्रश्न
Define: An Atom:
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उत्तर
An Atom: Smallest particle of an element that can exist and have properties of an element.
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संबंधित प्रश्न
If bromine atom is available in the form of, say, two isotopes `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`, calculate the average atomic mass of bromine atom.
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
Give the charge and the mass of an electron, proton and neutron present in an atom ?
Name the particles which revolve around the nucleus.
What does the word ‘atom’ mean?
How did Neils Bohr visualise the atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
Fill in the blank
An _______ is electrically neutral.
Name the unit in which the radius of an atom is usually expressed.
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?
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
The smaller particles found in the atom is called ______.
An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.
Define the following term with an example.
Metal
Define the following term with an example.
Non-metal
Which of the following statements made by Dalton has not undergone any change?
In all atoms of an element
In the nucleus of `""_20"Ca"^40`, there are ______
Which of the following has maximum number of atoms?
What is the fundamental particle of an element?
