Advertisements
Advertisements
प्रश्न
Find the correlation:
Group 1 and 2 : s block : : group 13 and 18 : ______
Advertisements
उत्तर
Group 1 and 2 : s block : : group 13 and 18 : p Block
Explanation:
The modern periodic table is divided into blocks based on the orbital being filled by the valence electrons:
- s-block: Includes Groups 1 and 2, where the last electron enters the s-orbital.
- p-block: Includes Groups 13 to 18, where the last electron enters the p-orbital.
APPEARS IN
संबंधित प्रश्न
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
Fill in the following blank with suitable word:
Group 18 elements are called ...............
On which side of the periodic table will you find metals?
The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:
(a) P
(b) Q
(c) R
(d) S
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in modern periodic table are arranged on the basis of increasing atomic masses.
(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
(c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
Which element has the electronic configuration 2, 8, 2?
What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
What is the number of elements is 1st period the modern periodic table?
What are the advantages of the periodic table?
Name two elements in each case:
Actinides
State its position in the periodic table?
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
Name the noble gas with 3 shells.
Write a short note.
Structure of the modern periodic table.
What is the number of elements in the 1st period?
Give the symbol and valency of the following element and radical.
Zinc
Give the symbol and valency of the following element and radical.
Ammonium
Give the chemical formula of sodium nitrate
Give the chemical formula of magnesium nitrate
Give the chemical formula of calcium phosphate
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.
What are the periods in a periodic table?
Right or wrong sentence.
The modern periodic table shows the molecular masses of the elements in each frame.
______ forms the basis of the modern periodic table.
How does the property vary in periods and in groups?
Identify gas A in the following experiment.

In the modern periodic table, elements are arranged according to their ______
The inert gas which lies in the third period is ______
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
An element which is an essential constituent of all organic compounds belongs to
Which of the following elements would lose an electron easily?
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.
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Which of the element is a Metalloid?
Define groups of modern periodic table.
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
