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प्रश्न
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
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उत्तर
What is the atomic numebr of X= 17
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संबंधित प्रश्न
Why is it not possible to see an atom with naked eyes?
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
ANSWER IN DETAIL
How are isobars different from isotopes ?
Write the names of the elements present in the:-
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An ion with positive charge is called ______
Define: Ions
Who originated the word ‘atom’ ?
Name the three subatomic particles present in an atom.
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
What is the contribution of the following in atomic structure?
Maharshi Kanada
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Which will form positive ion?
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State true or false. If false, correct the statement.
An atom is electrically neutral.
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.
Define the following term with an example.
Metal
Define the following term with an example.
Metalloid
In all atoms of an element
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
