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Test: Structure of the Atom- Case Based Type Questions - Class 9 MCQ


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12 Questions MCQ Test - Test: Structure of the Atom- Case Based Type Questions

Test: Structure of the Atom- Case Based Type Questions for Class 9 2024 is part of Class 9 preparation. The Test: Structure of the Atom- Case Based Type Questions questions and answers have been prepared according to the Class 9 exam syllabus.The Test: Structure of the Atom- Case Based Type Questions MCQs are made for Class 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Structure of the Atom- Case Based Type Questions below.
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Test: Structure of the Atom- Case Based Type Questions - Question 1

Direction: The electronic configuration of an element ‘X’ is 2, 8, 2 :

Q. How many Valence electrons are there in element X?

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 1
The element present in the outermost shell are known as Valence electrons. In the outermost shell of element X 2 Valence electrons are present.
Test: Structure of the Atom- Case Based Type Questions - Question 2

Direction: The electronic configuration of an element ‘X’ is 2, 8, 2 :

Q. The number of electrons present in the atom of element ‘X’ is __________.

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 2
The electronic configuration of element X is 2, 8, 2. So its atomic number is 12 and the number of electrons is equal to the atomic number.
Test: Structure of the Atom- Case Based Type Questions - Question 3

Direction: The electronic configuration of an element ‘X’ is 2, 8, 2 :

Q. The Valency of element X is:

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 3
The number of electrons present in the outermost shell is 2. So, the valency will be 2.
Test: Structure of the Atom- Case Based Type Questions - Question 4

Direction: The electronic configuration of an element ‘X’ is 2, 8, 2 :

Q. The element X is:

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 4
Element X is a metal.
Test: Structure of the Atom- Case Based Type Questions - Question 5

Direction: In the following table the mass number and the atomic number of certain elements are given. Study the given data and answer the following questions :

Q. The element which can form a cation:

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 5
Element B has number of protons greater than number of electrons.
Test: Structure of the Atom- Case Based Type Questions - Question 6

Direction: In the following table the mass number and the atomic number of certain elements are given. Study the given data and answer the following questions :

Q. Any two elements are Isobars:

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 6
The elements having different atomic numbers but same mass numbers are called Isobars. Element D and E both have same mass number i.e. 40 but different atomic number.
Test: Structure of the Atom- Case Based Type Questions - Question 7

Direction: In the following table the mass number and the atomic number of certain elements are given. Study the given data and answer the following questions :

Q. Which element will form an anion?

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 7
Element A has number of electrons greater than number of protons.
Test: Structure of the Atom- Case Based Type Questions - Question 8

Direction: In the following table the mass number and the atomic number of certain elements are given. Study the given data and answer the following questions :

Q. Which element is a noble gas?

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 8
The atomic number of element D is 18. So, it’s electronic configuration will be 2, 8, 8. The outermost shell is complete, so, it is a noble gas.
Test: Structure of the Atom- Case Based Type Questions - Question 9

Direction: Read the following passage and answer the following questions.

In order to overcome the objections raised against Rutherford’s model of the atom, Neil Bohr put forward the following postulates about the model of an atom.

Q. Who amended Rutherford’s short comings?

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 9
Neils’ Bohr amended Rutherford’s shortcomings.
Test: Structure of the Atom- Case Based Type Questions - Question 10

Direction: Read the following passage and answer the following questions.

In order to overcome the objections raised against Rutherford’s model of the atom, Neil Bohr put forward the following postulates about the model of an atom.

Q. Atoms are made up of ______, _____ and ______.

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 10
Atoms are made up of fundamental particles and these fundamental particles are electrons, protons and neutrons.
Test: Structure of the Atom- Case Based Type Questions - Question 11

Direction: Read the following passage and answer the following questions.

In order to overcome the objections raised against Rutherford’s model of the atom, Neil Bohr put forward the following postulates about the model of an atom.

Q. Atomic mass is the sum of:

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 11
Atomic mass = number of protons + number of neutrons.
Test: Structure of the Atom- Case Based Type Questions - Question 12

Direction: Read the following passage and answer the following questions.

In order to overcome the objections raised against Rutherford’s model of the atom, Neil Bohr put forward the following postulates about the model of an atom.

Q. The number of electrons that K-shell and L-shell can accommodate:

Detailed Solution for Test: Structure of the Atom- Case Based Type Questions - Question 12
According Bohr’s rule 2n2, first shell or K-shell should accommodate 2 electrons and second shell or L-shell should accommodate 8 electrons.
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