As we move from left to right in a period in modern periodic table, Atomic sizes of the elements generallya)increaseqb)decreasec)remain samed)approach zeroCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

In a period, more electrons are added to the same shell as we go from left to right because the atomic number increases. This also increases the attraction between electrons and protons and that's why atomic size decreases. Increasing nuclear charge pulls the electrons closer to the nucleus.

Answer

As because Valence electrons across a period increases and thus, attraction between electrons and nucleus also increases due to more no. of electrons and thus it leads to shrinkage of shell size.

To understand it more clearly, electrons get added in the same shell across a period and simultaneously protons also get added , making it more positively charged over a single shell of negative charge.
So, the shell size decreases!

Hope u like it!

Answer

Understanding Atomic Size Trends
As we move from left to right across a period in the modern periodic table, the atomic size of elements generally decreases. This phenomenon can be explained through several key factors:
1. Increase in Nuclear Charge
- As we move from left to right, the number of protons in the nucleus increases.
- This increase in positive charge attracts the negatively charged electrons more strongly.
2. Constant Shielding Effect
- The number of electron shells remains the same across a period.
- Although more electrons are added, they are added to the same shell, leading to minimal increase in the shielding effect.
- As a result, the effective nuclear charge (the net positive charge experienced by electrons) increases.
3. Resulting Decrease in Atomic Size
- The stronger attraction between the nucleus and the electrons pulls the electron cloud closer to the nucleus.
- This leads to a decrease in atomic radius as you move from left to right across a period.
Conclusion
In summary, the atomic size decreases from left to right in a period due to the increase in nuclear charge without a corresponding increase in electron shielding. This results in a stronger attraction between the nucleus and the electrons, causing the atoms to become smaller.

Answer

Oh no dude, option B is wrong becz when we move left to right in modern periodic table then the atomic sizes of the element generally increases.

Top Courses for Class 10View all

Science Class 10

Social Studies (SST) Class 10

Mathematics (Maths) Class 10

Past Year Papers for Class 10

English Class 10

Top Courses for Class 10

Top Courses for Class 10

Related Content

About Class 10

Class 10 Study Material

Class 10 All Subjects

NCERT Textbook Solutions

Other Classes

Important Links

Company