UrbanPro

Take Class 11 Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Write down the outermost electronic configuration of alkali metals. How will you justify their placement in group 1 of the periodic table?

Asked by Last Modified  

Follow 1
Answer

Please enter your answer

The alkali metals are located in Group 1 of the periodic table. The outermost electronic configuration of alkali metals can be represented as ns^1, where 'n' represents the principal quantum number of the valence shell. Here's the outermost electronic configuration of alkali metals: Lithium (Li):...
read more

The alkali metals are located in Group 1 of the periodic table. The outermost electronic configuration of alkali metals can be represented as ns^1, where 'n' represents the principal quantum number of the valence shell.

Here's the outermost electronic configuration of alkali metals:

  • Lithium (Li): 1s^2 2s^1
  • Sodium (Na): 1s^2 2s^2 2p^6 3s^1
  • Potassium (K): 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1
  • Rubidium (Rb): 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 5s^1
  • Cesium (Cs): 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 5p^6 6s^1
  • Francium (Fr): 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 4f^14 5s^2 5p^6 5d^10 6s^2 6p^6 7s^1

Justification for their placement in Group 1 of the periodic table:

  1. Similar Outermost Electron Configuration: All alkali metals have one electron in their outermost shell, specifically in the s orbital. This makes them highly reactive as they tend to lose this single electron to achieve a stable noble gas configuration with a complete outer shell.

  2. Similar Chemical Properties: Alkali metals share similar chemical properties due to their similar outermost electronic configuration. They readily lose their outermost electron to form positively charged ions (cations) with a charge of +1. This common behavior is a defining characteristic of Group 1 elements.

  3. Reactivity Trend: Reactivity increases as you move down Group 1. This trend can be attributed to the decreasing ionization energy down the group, which makes it easier for the outermost electron to be removed. This leads to more vigorous reactions with water and other substances.

  4. Similar Physical Properties: Alkali metals exhibit similar physical properties such as softness, low melting points, and low densities. These properties arise from the weak metallic bonding and the tendency for the atoms to form metallic lattices.

In summary, the placement of alkali metals in Group 1 of the periodic table is justified by their similar outermost electronic configuration, resulting in similar chemical properties, reactivity trends, and physical properties, all of which are characteristic of Group 1 elements.

 
 
 
read less
Comments

Related Lessons


Periodic table
The elements are classified as S P D F blocks based which shells there valance electrons enters. When we comparing the periodic properties Atomic size : As no shells increases size also will increases...


How to Remember first 20 elements of periodic table?
So this is the trick I learnt during myu schooloing period, now I spread to my students. Atomic Number Element Phonic word(Bold are symbol of Element) 1 Hydrogen Hi 2 Helium Hello ...

ATOMIC STRUCTURE AND ITS IMPORTANCE
Hello friends, Atomic stucture is an important chapter in class 11. It's very intresting topic and easy to learn. Atoms have many sub-atomic particles, among them basic and important are listed below. They...

Recommended Articles

With the current trend of the world going digital, electronic renaissance is a new movement that is welcomed by the new generation as it helps makes the lives of millions of people easier and convenient. Along with this rapidly changing movement and gaining popularity of Internet, e-Learning is a new tool that emerging...

Read full article >

Appearing for exams could be stressful for students. Even though they might have prepared well, they could suffer from anxiety, tension etc. These are not good for their health and mind. However, following a few exam preparation tips can save them from all these and help them to score good marks. Let’s find out all...

Read full article >

While schools provide formal education to the children, the home is where they start learning about things informally. Parents think that schools will take the initiative to educate their children. Well, this is partially true, as parents also play an essential role in bringing up their child. For the development of particular...

Read full article >

Quality education does not only help children to get a successful career and life, but it also hugely contributes to society. The formal education of every child starts from school. Although there are numerous schools, parents find it challenging to choose the right one that would fit their child. It is difficult for them...

Read full article >

Looking for Class 11 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for Class 11 Tuition Classes?

The best tutors for Class 11 Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take Class 11 Tuition with the Best Tutors

The best Tutors for Class 11 Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more