Advertisements
Advertisements
प्रश्न
An element A has 2 electrons in its fourth shell. State:
is it an oxidising or reducing agent
Advertisements
उत्तर
It is a Reducing agent.
APPEARS IN
संबंधित प्रश्न
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 any one difference in the electronic configurations of group-1 and group-2 elements ?
How does the number of:
valency vary on moving from left to right in the second period of the periodic table?
Which element has:
twice as many electrons in its second shell as in its first shell?
An element 'M' has atomic number 12.
(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.
What will be the valency of an element of atomic number 9 (nine)?
How do you calculate the possible valency of an element from the electronic configuration of its atoms?
Atomic number of metal ‚A‛ is 11, while atomic number of metal ‚B‛ is 20. Which of them will be more reactive? Write the chemical reaction of dilute HCl with metal ‚A‛.
Fill in the blank
There are ______ groups and ______ periods in the modern form of periodic table.
Copy and complete the following sentence choosing the correct word or words from those given below, at the end of the sentence:
The similarities in the properties of elements belonging to a group are because they have the same ______
