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प्रश्न
Write true or false for the following statement
An atom on the whole has a positive charge.
पर्याय
True
False
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उत्तर
false
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संबंधित प्रश्न
Fill in the blank
An ion which has a positive charge is called a ..................
Multiple Choice Questions
The sub atomic particle with negative charge is
The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one:
- Forms an anion
- Forms a cation
- Has four electrons in its valence shell?
State why the atomic weight of an element is also termed relative atomic mass.
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Phosphorus – \[\ce{^31_15P}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
Which sub-atomic particles in the 3 isotopes of ‘H’ are the same.
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Lithium [At. no. = 3, Mass no. = 7]
The elementary particles such as protons and neutrons are collectively called ______.
Mass No =______ + No. of Neutrons.
