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प्रश्न
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X ?
उत्तर
What is the mass number of X= 35
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संबंधित प्रश्न
Define: Relative atomic mass
What are orbits or shells ?
Define: Covalent bond
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
Why is it not possible to see an atom even with the most powerful microscope ?
What value has been given to the mass of this reference atom ?
State two observations which show that atom is not indivisible.
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of aluminium
Define the following term with an example.
Element
Define the following term with an example.
Non-metal
Define the following term with an example.
Metalloid
In all atoms of an element
Dalton’s atomic theory successfully explained
(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions
The smallest unit of an element is ______.
Lead is also known as plumbum.
What is the fundamental particle of an element?
