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प्रश्न
______ is the smallest particle of an element.
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उत्तर
Atom is the smallest particle of an element.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
ANSWER IN DETAIL
How are isobars different from isotopes ?
Fill in the blank
An ion with positive charge is called ______
What are orbits or shells ?
Who originated the word ‘atom’ ?
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?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
What value has been given to the mass of this reference atom ?
One nm is equal to :
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
Which of the following statement is correct about the atom of an element ?
Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.
(Atomic masses : Al = 27 u ; Fe = 25 u)
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
1 mole of Gold and Silver contain same number of atoms.
The graphite refill used is pencil is made of element called ______.
The ______ are combination of atoms of various elements or the same element.
Atoms have a radius of the order ______.
