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प्रश्न
Who originated the word ‘atom’ ?
उत्तर
Democritus
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संबंधित प्रश्न
Why is it not possible to see an atom with naked eyes?
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
WRITE SHORT ANSWER
Name three inert gases.
What does an atom consist of ? Explain.
Name the particle or particles you would expect to find in :
The orbit of an atom
Fill in the blank
An excess of electrons produces a ________ charge.
Name the unit in which the radius of an atom is usually expressed.
Find the mass of 2 moles of nitrogen atoms.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
Draw the diagrams representing the atomic structures of the following: Neon
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
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.
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
A change in the physical state can be brought about
What is the fundamental particle of an element?
The ______ are combination of atoms of various elements or the same element.
