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Test: Electronic Configurations of Elements and the Periodic Table - Chemistry MCQ


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10 Questions MCQ Test - Test: Electronic Configurations of Elements and the Periodic Table

Test: Electronic Configurations of Elements and the Periodic Table for Chemistry 2024 is part of Chemistry preparation. The Test: Electronic Configurations of Elements and the Periodic Table questions and answers have been prepared according to the Chemistry exam syllabus.The Test: Electronic Configurations of Elements and the Periodic Table MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Electronic Configurations of Elements and the Periodic Table below.
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Test: Electronic Configurations of Elements and the Periodic Table - Question 1

The fourth period ends with the element ________

Detailed Solution for Test: Electronic Configurations of Elements and the Periodic Table - Question 1

Every period ends with a noble gas, as the element at the end of the period is with the fully filled orbitals. The 4th period has an outer shell as O i.e. n = 4. So the configuration is [Ar}4s23d104p6, that is Krypton.

Test: Electronic Configurations of Elements and the Periodic Table - Question 2

The electrons’ distribution into the atomic orbitals is called as ______

Detailed Solution for Test: Electronic Configurations of Elements and the Periodic Table - Question 2

When electrons are distribution into the orbitals of the atoms by following Aufbau’s principal, Hund’s rule maximum multiplicity and Pauli’s exclusive principle, the order they are filled is represented by the electronic configuration.

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Test: Electronic Configurations of Elements and the Periodic Table - Question 3

Group I elements are called as ________

Detailed Solution for Test: Electronic Configurations of Elements and the Periodic Table - Question 3

Group I elements are known as Alkali metals as they have a great ability to form strong bases i.e. alkalies. Alkalies are the strong bases with the ability to neutralize strong acids. They consists of Lithium(Li), Sodium(Na), Potassium(K), Rubidium(Rb), Cesium(Cs) and Francium(Fr).

Test: Electronic Configurations of Elements and the Periodic Table - Question 4

The location of any element in the periodic table is determined by the ______ of the filled last orbital.

Detailed Solution for Test: Electronic Configurations of Elements and the Periodic Table - Question 4

Quantum numbers are responsible for an element’s position in the periodic table. For example, as we know the principal quantum number defines the main energy level i.e. shell. The last orbital principal quantum number is the periodic number of the element.

Test: Electronic Configurations of Elements and the Periodic Table - Question 5

How many electrons are there in the L-shell of Boron?

Detailed Solution for Test: Electronic Configurations of Elements and the Periodic Table - Question 5

The atomic number of Boron is 5 and it contains two elements in the K-shell and three elements in the L-shell as well as 4 electrons in s-orbital and 1 electron and p-orbital. The element preceding Boron is beryllium and the element succeeding Boron is carbon.

Test: Electronic Configurations of Elements and the Periodic Table - Question 6

Write the correct electronic configuration of Neon.

Detailed Solution for Test: Electronic Configurations of Elements and the Periodic Table - Question 6

Neon is made up of 10 electrons. As per Aufbau’s principle, orbitals with lower energy must be filled first and s-orbital can only accommodate 2 electrons while p can accommodate 6 electrons. So the electronic configuration of Neon is 1s22s22p6.

Test: Electronic Configurations of Elements and the Periodic Table - Question 7

What are the d-block elements called?

Detailed Solution for Test: Electronic Configurations of Elements and the Periodic Table - Question 7

The d-block elements are called transition elements as the electrons are energetically filled. The exact meaning of transition elements is that elements have either partially or fully filled subshell or can actively cations by losing electrons.

Test: Electronic Configurations of Elements and the Periodic Table - Question 8

3d transition series starts from _____ and ends with ______

Detailed Solution for Test: Electronic Configurations of Elements and the Periodic Table - Question 8

In the 3d transition series, the have either partially or fully filled 3d orbitals. The 3d transition state starts from Scandium (Z = 21) having electronic configuration as 3s23d1 and ends with Zinc (Z = 30) whose electronic configuration is 3s23d10.

Test: Electronic Configurations of Elements and the Periodic Table - Question 9

The Lanthanoid series is the same as the Actinoid series.

Detailed Solution for Test: Electronic Configurations of Elements and the Periodic Table - Question 9

Both the Lanthanoid series and the Actinoid series make up Inner transition elements, but they are not the same. The 4f elements are lanthanoids (Z = 57 to Z = 71) and 5f are actinides (Z = 89 to Z = 113).

Test: Electronic Configurations of Elements and the Periodic Table - Question 10

Which block elements are known as inner transition elements?

Detailed Solution for Test: Electronic Configurations of Elements and the Periodic Table - Question 10

Inner transition elements are f-block i.e. 4f and 5f. They include elements from 57 to 71 and 89 to 103. The 4f elements are lanthanoids (57 – 71) and 5f are actinides (89 – 113). Most of the actinides are radioactive.

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