Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

(a)How and (b)why do atomic radii of elements change as we move (1)from left to right in a period (2)down a group in the periodic table
Asked by Mythrayee Balasubramanian | 19 Feb, 2012, 11:01: AM
answered-by-expert Expert Answer
It is a fundamental phenona. When we move from left to right in a period, at each step one more electron is being added to the atom. So, the atomic radii increases.
 
Similarly, when we move down the group. due to the incoming 8, 18 or 32 electrons, the atomic radius increases. 
Answered by | 19 Feb, 2012, 01:44: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Chemistry
what is elements
Asked by dhumalchhaya13 | 26 May, 2022, 11:05: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
what is periods
Asked by kanchanbalpande82 | 12 Apr, 2022, 11:01: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
what is periods
Asked by kanchanbalpande82 | 12 Apr, 2022, 11:01: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
Modern period table  
Asked by waghmaresheetal78 | 27 Dec, 2021, 05:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
1. Electronic configuration of an element ‘x’ is 2.8.1 and for ‘Y’ 2.8.7 then mention the bond existing between 2 elements. a) Covalent bond b) Ionic bond c) Hydrogen bond d) Metallic bond 2. Identify the element in a 2nd period and 14th group with valency 4. a) Carbon –C b) Silicon – Si c) Boron – B d) Fluorine – F 3. Modern periodic law state that “the properties of elements are the periodic function of their ___________. a) Atomic number b) Atomic mass c) Valiancy d) Atomic radius.   Name the group of hydrogen.   9. In a Modern periodic table how the ionization energy, metallic nature and atomic radius vary? 10. 6 C 12 , 20Ca40 , 21SC45 Write the Electronic configuration of given elements and mention the group period and block    
question image
Asked by ksheera36 | 03 Jun, 2021, 08:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
How tp learn the symbols element
Asked by vungtsaniyanthan | 16 May, 2021, 06:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
drawbacks of mendeleev and modern periodic table with example
Asked by sinhagopalakumara | 01 May, 2021, 08:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
Que:-How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?
Asked by advssdrall | 26 Mar, 2021, 07:43: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
name two elements of first period in modern periodic table
Asked by kavithasenthil148 | 06 Feb, 2021, 07:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Chemistry
how many elements were discovered at the of newland
Asked by mina6poonam | 21 Jan, 2021, 04:57: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×