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Structure of the Atom — Practice Quiz

Gujarat Board · Class 9 · Science

Try a 4-question quiz on Structure of the Atom for Gujarat Board Class 9 Science: tap an answer to check it and see why.

45 questions25 flashcards3 formulas & key relations5 concepts

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An illustration of J.J. Thomson's atomic model, depicting an atom as a sphere of uniformly distributed positive charge with electrons (plums) embedded within it.
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Quick Quiz: Structure of the Atom

0/4

Tap an answer to check it instantly. No sign-up needed for these 4.

1

Who discovered the electron?

2

What is the charge on an electron?

3

According to Thomson's model, where are electrons located in an atom?

4

What did Rutherford's alpha particle scattering experiment prove?

45 Questions·
multiple choicemultiple correct

Sample Questions

1multiple correct

Which subatomic particles are present in the nucleus of an atom?

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Protons, Neutrons

The nucleus contains protons (positively charged) and neutrons (neutral). Electrons revolve around the nucleus in shells. Alpha particles are not part of atomic structure.

2multiple choice

What is the maximum number of electrons that can be accommodated in the K shell?

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2

The K shell (n=1) can hold a maximum of 2 electrons according to the formula 2n². For K shell: 2×1² = 2 electrons.

3multiple correct

Which of the following elements have the same number of valence electrons?

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Lithium (Li), Sodium (Na), Potassium (K)

Lithium, Sodium, and Potassium all have 1 electron in their outermost shell, making them have the same valency of 1. Magnesium has 2 valence electrons and Fluorine has 7.

4multiple choice

What is the atomic number of an element that has 7 protons in its nucleus?

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7

The atomic number of an element is equal to the number of protons in its nucleus. If there are 7 protons, the atomic number is 7, which corresponds to nitrogen.

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Frequently Asked Questions

What are the important topics in Structure of the Atom for Gujarat Board Class 9 Science?
Key topics in Structure of the Atom include Charged Particles in Matter – Sub-Atomic Particles, Atomic Models – Thomson, Rutherford, and Bohr, Distribution of Electrons in Shells (Bohr-Bury Rules), Valency. Study these first, then practise questions on each for Class 9 exams.
How many practice questions are there for Structure of the Atom?
There are 45 questions on Structure of the Atom. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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