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प्रश्न
Distinguish between:
s-block - p-block
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उत्तर
| s-block | p-block | |
| 1. | The s-block contains groups 1 and 2. | The p-block contains groups 13 to 18. |
| 2. | All the elements of s-block are metals. | p-Block elements include metals, nonmetals and metalloids. |
| 3. | s-block elements are placed to the extreme left side in the modern periodic table. | p-block elements are placed to the extreme right side in the modern periodic table. |
| 4. | There is no zig-zag line to separate different types of elements in the s-block of the periodic table. | A zig-zag line can be drawn to separate different types of elements (metals, metalloids and nonmetals) in the p-block of the periodic table. |
संबंधित प्रश्न
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
In the Modern Periodic Table, which are the metals among the first ten elements?
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
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 of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
Give alongside is a part of the periodic table :
As we move horizontally from left to right:
| Li | Be | B | C | N | O | F | |
| Na | Mg | Al | Si | P | S | Cl |
(i) What happens to the metallic character of the elements?
(ii) What happens to the atomic size?
What is a period in a periodic table?
What is the number of elements is 1st period the modern 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.
In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?
What are the advantages of the periodic table?
What are the periods in a periodic table? Give two characteristics of each.
Define:
Periodic table
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
How many groups and periods does the modern periodic table have?
Name two elements in halogens.
Name two elements in each case: Lanthanides
Write a short note.
Position of isotopes in the Mendeleev’s and the modern 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.
Define the atomic size.
Name the cation and the anion in the salt – calcium sulphate
Give the symbol and valency of the following element and radical.
Bisulphite
Give the chemical formula of sodium bicarbonate
Fill in the blank:
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group ______.
State the number of elements in Period 3 of the Periodic Table.
Write scientific reason.
Lithium and sodium are included in the same group in periodic table.
Complete the following flow chart.
Distinguish between:
Group 17 - Group 18
______ and ______ are called inner transition elements.
On moving from left to right in a period in the periodic table, the size of the atom ______
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
Which of the following elements will form an acidic oxide?
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has variable valency and is a member of the Oxygen family (group 16).
An element with atomic number ______ will form a basic oxide.
Name the metalloids in the first twenty elements.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
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?
