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Draw the structure of an atom and explain the position of the sub-atomic particles. - Science

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प्रश्न

Draw the structure of an atom and explain the position of the sub-atomic particles.

संक्षेप में उत्तर
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उत्तर

Structure of an atom.

Position of the subatomic – particles.
Atom consist of three sub-atomic.
Particles: 1. Protons, 2. Electrons, 3. Neutrons

  1. The nucleus of the atom contains the protons (positively charged) and the neutrons (no change)
  2. The outermost regions of the atom are called electron shells and contain the electrons (negatively charged)
  3. The protons have a positive charge while neutrons have a neutral charge.
  4. Electrons circle around the nucleus of an atom, they are negatively charged.
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अध्याय 4: Atomic Structure - Evaluation [पृष्ठ ५२]

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सामाचीर कलवी Science - Term 1 [English] Class 7 TN Board
अध्याय 4 Atomic Structure
Evaluation | Q IX. 1. | पृष्ठ ५२

संबंधित प्रश्न

Why is it not possible to see an atom with naked eyes?


TRUE \ FALSE

Elements combine in definite proportions to form compounds.


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 ?


Define:- Radicals


Write the names of the elements present in the :- 

Sulphuric acid


Write the names of `"Ca"("NO"_3)_2` compounds :


Write the names of `"FeS"` compounds :


Define: Chemical bond


Name two particles found inside the nucleus. What are they collectively called ?


Name three non-metals/radicals which have valency -1, -2, and -3.


Name the particle or particles you would expect to find in :

The nucleus of an atom


An atom has 13 protons and 14 neutrons.

What is the atomic mass of the atom ?


A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.

What is the atomic numebr of X ?


What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?


Fill in the following blanks with suitable words :

In water, the proportion of oxygen and hydrogen is .............. by mass.


What value has been given to the mass of this reference atom ?


In what respects do the three isotopes of hydrogen differ? Give their structures.


Elements X and Y have 1 and 7 electrons in their outermost shell respectively.

Which will form negative ion?


The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus


A compound containing one atom of carbon and two atoms of oxygen is ______.


An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.


Define the following term with an example.

Compound


Define the following term with an example.

Non-metal


Which of the following statements made by Dalton has not undergone any change?


Atoms of one element can be transmuted into atoms of other elements by ______


A change in the physical state can be brought about


Does the solubility of a substance change with temperature? Explain with the help of an example.


Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order

  1. Rutherford’s atomic model
  2. Thomson’s atomic model
  3. Bohr’s atomic model

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