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CBSE Class 10 Answered

Where is an element with variable valency stored under water placed in the periodic table?
Asked by ashok sharma | 28 Jan, 2012, 09:44: PM
answered-by-expert Expert Answer
The elements which is kept in water is phosphorus. Phosphorus is placed in Group 15 period 3.
Answered by | 29 Jan, 2012, 05:57: PM

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CBSE 10 - Chemistry
what is elements
Asked by dhumalchhaya13 | 26 May, 2022, 11:05: PM
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CBSE 10 - Chemistry
what is periods
Asked by kanchanbalpande82 | 12 Apr, 2022, 11:01: AM
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CBSE 10 - Chemistry
what is periods
Asked by kanchanbalpande82 | 12 Apr, 2022, 11:01: AM
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CBSE 10 - Chemistry
Modern period table  
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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    
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CBSE 10 - Chemistry
How tp learn the symbols element
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CBSE 10 - Chemistry
drawbacks of mendeleev and modern periodic table with example
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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
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CBSE 10 - Chemistry
name two elements of first period in modern periodic table
Asked by kavithasenthil148 | 06 Feb, 2021, 07:09: PM
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CBSE 10 - Chemistry
how many elements were discovered at the of newland
Asked by mina6poonam | 21 Jan, 2021, 04:57: PM
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