Advertisements
Advertisements
प्रश्न
The modern periodic table is divided into which blocks?
Advertisements
उत्तर
The modern periodic table is divided into s-block, p-block, d-block, f-block.
APPEARS IN
संबंधित प्रश्न
Why do all the elements of the same group have similar properties?
What is meant by a period, in a periodic table?
Give two example of group 18 elements.
What is the significance of atomic number in the modern classification of elements? Explain with the help of an example.
What is the name of those elements which divide metals and non-metals in the periodic table?
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
State how the valency of elements varies in a period of the periodic table?
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.
Give the group number of following elements present in periodic table
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
What will be the formula of its phosphate?
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
Name the noble gas with 3 shells.
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.
Write a short note.
Structure of the modern periodic table.
How many periods and groups are there in the modern periodic table?
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
What is the number of elements in the 3rd period, of the modern periodic table?
Name and state the following with reference to the elements of the first three periods of the periodic table.
A covalent compound formed by an element in period 2 and a halogen.
An element A has 2 electrons in its fourth shell. State its electronic configuration.
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
Answer the following question.
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?
Define the atomic size.
Give the symbol and valency of the following element and radical.
Ammonium
Give the symbol and valency of the following element and radical.
Sulphite
Give the chemical formula of sodium sulphite
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
Write scientific reason.
Lithium and sodium are included in the same group in periodic table.
State any five features of modern periodic table.
Which of the following statements about the Modern Periodic Table is correct:
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?
Which one of the following elements exhibit maximum number of valence electrons?
If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
Match the atomic number with the following:
A rare gas.
