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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

The Diagram Represents an Isotope of Hydrogen H. Answer the Following: Which Sub-atomic Particles in the 3 Isotopes of ‘H’ Are the Same.

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प्रश्न

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.

एका वाक्यात उत्तर
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उत्तर

Protons and electrons in each isotope are the same.

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पाठ 4: Atomic Structure - Objective type questions

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संबंधित प्रश्‍न

Explain the Mass number with example.


 Give the following a suitable word/phrase.

Atoms of same element with same atomic number but a different mass number.


 Multiple Choice Questions

 The sum of number of protons and number of neutrons present in the nucleus of an atom is called its


What is the significance of atomic numbers in the modern Periodic Table?


Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:

Isotopes of hydrogen [11H, 21H, 31H]


Elements X, Y, Z have atomic numbers 6, 9 and 12 respectively. Which one:

  1. forms anion – negative ion;
  2. forms cation – positive ion;
  3. has 4 electrons in the outermost orbit. [Y, Z, X]

Elements A, B and C have atomic numbers 9, 20 and 10 respectively.

  1. State which one is
    (1) a non-metal,
    (2) a metal,
    (3) chemically inert.[A,B,C]
  2. Write down the formula of the compound formed by two of the above elements.[BA2]

The atomic number and the mass number of an element is 26 and 56 respectively. Calculate the number of electrons, protons and neutrons in its atom. Draw the structure.


The elementary particles such as protons and neutrons are collectively called ______.


A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).

Boron, Aluminium, Gallium, Indium, Thallium

Answer the following question in relation to the above group of elements:

The atomic number of boron is 5. Write the chemical formula of the compound formed when boron reacts with chlorine.


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