CBSE Class 10 - Modern Periodic Table of Elements Videos
Determination of valency and molecular formula
This video deals with solved problem based on the concept of determination of valency and molecular formula.
- what is elements
- what is periods
- what is periods
- Modern period table
-
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
- How tp learn the symbols element
- drawbacks of mendeleev and modern periodic table with example
- 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?
- how does the atomic size vary as you go down a group?
- Just as the way we locate a point on graph as (x, y), can we locate an element as (group number, period)?
