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प्रश्न
Multiple Choice Questions
The sub atomic particle with negative charge is
पर्याय
proton
neutron
electron
nucleon
उत्तर
electron
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संबंधित प्रश्न
Write true or false for the following statement
An atom on the whole has a positive charge.
The atomic number and the mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement.
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?
Match the atomic numbers 4,8,10,15 and 19 with each of the following:
An element which does not form ion
Elements X, Y and Z have atomic numbers 6,9 and 12 respectively. Which one:
- Forms an anion
- Forms a cation
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]
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]
From the symbol \[\ce{^4_2He}\] for the element helium, write down the mass number and the atomic number of the element.
When an atom gives electrons from its outermost shell, it becomes ______ charged.
State the term for the following:
The amount of substance which contains the same number of units as the number of atoms in carbon-12.
