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तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ७

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

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प्रश्न

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

थोडक्यात 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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पाठ 4: Atomic Structure - Evaluation [पृष्ठ ५२]

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

संबंधित प्रश्‍न

Tick the most appropriate answer.

Who discovered that radioactive rays are given out by uranium?

  1. Henri Becquerel
  2. Marie Curie
  3. Pierre Curie
  4. Schmidt

WRITE SHORT ANSWER

What is radioactivity?


 Give the charge and the mass of an electron, proton and neutron present in an atom ?


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


Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.


An atom has 13 protons and 14 neutrons.

What is the atomic mass of the atom ?


Fill in the blank

If an atom loses an electron, it acquires ______ a charge.


An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.


Calculate the number of moles in 12.044 × 1025 atoms of phosphorus.


Compare: 

Chlorine atom and chloride ion, with respect to

Atomic structure
Electrical state


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

Which element will lose electron?


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


Define the following term with an example.

Element 


The smaller particles found in the atom is called ______.


An element is composed of ______ atoms.


Define the term ions or radicals.


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


The number of atoms present in a molecule is called its ______.


A change in the physical state can be brought about


What is the fundamental particle of an element?


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