Advertisements
Advertisements
प्रश्न
Give the chemical formula of carbonic acid
Advertisements
उत्तर
It denotes in a compound, the number of atoms of element present.
∴ Formula = \[\ce{H2CO3}\]
APPEARS IN
संबंधित प्रश्न
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
What are the merits of the modern periodic table of elements?
In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
Name two elements in Alkali metals.
An element E has following electronic configuration:
|
K |
L |
M |
|
2 |
8 |
6 |
(a) To which group of the periodic table does element E belong?
(b) To which period of the periodic table does element E belong?
(c) State the number of valence electrons present in element E.
(d) State the valency of the element E.
Define the atomic size.
Which of the following is the outermost shell for elements of period 2?
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
