Quiz practice Science for Class 9th structure of the atom

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Science Quiz for Practice CBSE 9th. “Sharpen your skills with our Mathematics Quiz for CBSE Class 9th. Prepare smarter, not harder. This quiz is designed to help you practice key concepts, strengthen problem-solving skills, and build confidence for your exams.

structure of the atom

1 / 15

An element has an electronic configuration of 2, 8, 1. What is its atomic number?

2 / 15

What will be the valency of an element with an atomic number of 16?

3 / 15

An atom has 11 protons, 11 electrons, and 12 neutrons. What is its mass number?

4 / 15

An atom has an atomic number of 17 and a mass number of 35. How many neutrons does it have?

5 / 15

Which model of the atom is also known as the ‘Plum Pudding Model’?

Rutherford’s Model

Bohr’s Model

Dalton’s Model

J.J. Thomson’s Model

6 / 15

. Which radioactive element is utilized in cancer treatment?

Iodine-131

Uranium-234

Plutonium-239

Cobalt-60

7 / 15

Which statement is incorrect regarding observations in Rutherford’s α-particle scattering experiment?

Some α-particles rebound after hitting the gold foil

Some particles deflect from their path

Some particles fail to pass through the gold foil

Most particles pass straight through the gold foil

8 / 15

Between Sulphur (S) with atomic number 16 and Chlorine (Cl) with atomic number 17, which is more chemically reactive?

Chlorine

Sulphur

Both are equally reactive

None of these

9 / 15

Who discovered the electron?

J.J. Thomson

Ernest Rutherford

Marie Curie

Dmitri Mendeleev

10 / 15

Which of the following represents the correct electronic configuration of oxygen?

2, 6

2, 8

2, 4

2, 2, 4

11 / 15

The mass number of an atom is determined by the total number of:

Electrons

Protons

Neutrons

Nucleons

12 / 15

Who proposed the planetary model of the atom?

Niels Bohr

John Dalton

Ernest Rutherford

J.J. Thomson

13 / 15

Which of the following statements about isotopes is true?

Isotopes have the same number of protons but different numbers of neutrons.

Isotopes have the same number of neutrons but different numbers of protons.

Isotopes have the same number of protons and neutrons.

Isotopes have different numbers of protons and electrons.

14 / 15

When atoms share electrons what type of bond is formed?

Hydrogen bond

Metallic bond

Covalent bond

Ionic bond

15 / 15

What is the mass number of an atom?

The total number of electrons in the atom.

The number of protons in the nucleus.

The sum of protons and neutrons in the nucleus.

The number of shells in the atom’s electron cloud.

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Quiz practice Science for Class 9th structure of the atom

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