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Notes 4. Structure of The Atom - page 5 | Class 9 Science - Toppers Study

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4. Structure of The Atom

| page 5 |

Notes 4. Structure of The Atom - page 5 | Class 9 Science - Toppers Study

Lesson - 4

Q1. Maximum, how many electrons are held in N orbit of an atom?

Ans: 32 electrons.

Q2. What is the source of Alpha particles of Rutherford experiment?

Ans: Double charged Helium particle.

Q3. Name the non-atomic particle which does not take part in atomic mass.

Ans: Electrons.

Q4. Name the positive charged atomic particles which presence in nucleus.

Ans: Protons.

Q5. Copper has atomic number 29. Then what is its valency?

Ans: 1

Q6. Give the example of isobar?

Ans: Calcium, Argon

Q7. Name the scientist who proposed that the atom is as chrismas cake.

Ans: J. Thomson.

Q8. Name the scientist who discovered protons.

Ans: E Gold Steen.

Q9.

Q10. Name the isotope of hydrogen which has 2 atomic mass number.

Ans: Deuterium

Q11. Name the non-atomic particle which takes part in atomic mass and having no charge.

Ans: Neutron

Q12. Name the isotope of element which is used in treatment of goiter. – Iodine

Q13. Name the scientist who discovered the nucleus.

Ans: Rutherford

Q14.

Q15. Name the scientist who discovered the neutron.

Ans: J. Chadwick

Q16. Name the isotopes of element which is used in atomic reacter as fuel.

Ans: Uranium

Other Pages of this Chapter: 4. Structure of The Atom

1. Chapter 4. Structure of The Atom | Non-atomic particles

2. Chapter 4. Structure of The Atom | Model of An Atom

3. Chapter 4. Structure of The Atom | Electronic Configuration And valency

4. Chapter 4. Structure of The Atom | Isotopes And Isobar

5. Chapter 4. Structure of The Atom | page 5

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