Advertisements
Advertisements
Question
How does the valency of elements change of moving from left to right in the third period of the periodic table?
Solution
The valency of the elements increases from 1(Na) to 4 (Si) and then decreases to 0 (Ar), on moving from left to right in the third period of the periodic table.
APPEARS IN
RELATED QUESTIONS
Two elements ‘A’ and ‘B’ belong to the 3rd period of Modern periodic table and are in group 2 and 13, respectively. Compare their following characteristics in tabular form:-
(a) Number of electrons in their atoms
(b) Size of their atoms
(c) Their tendencies to lose electrons
(d) The formula of their oxides
(e) Their metallic character
(f) The formula of their chlorides
Write the atomic numbers of two elements 'X' and 'Y' having electronic configuration 2, 8, 2 and 2, 8, 6 respectively.
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is ______.
An element 'M' has atomic number 11.
(a) Write its electronic configuration.
(b) State the group to which 'M' belongs.
(c) Is 'M' a metal or a non-metal.
(d) Write the formula of its chloride.
Explain
Size of atom changes when it loses or gain electron
Arrange the following in order of increasing radii:
N, O, P
State the nature of compounds formed when group 17 elements combine with (i) metals (ii) non-metals.
Name the elements in Period 1.
State the property trends in general of elements on moving from left to right in a period of the periodic table.
Select the correct answer from the options given below.
Is the group number of the element whose atomic number is 4.