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प्रश्न
The modern periodic table is divided into which blocks?
उत्तर
The modern periodic table is divided into s-block, p-block, d-block, f-block.
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संबंधित प्रश्न
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of elements vary on moving down a vertical column? How does the size of atomic radius vary on moving left to right in a horizontal row? Give reason in support of your answer in the above two cases.
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
What is meant by a period, in a periodic table?
Give two example of group 1 elements.
The atomic particle whose number in the atoms of an element always remains the same and which forms the real basis for the modern classification of elements is:
(a) electron
(b) proton
(c) neutron
(d) meson
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
Which element has two shells, both of which are completely filled with electrons?
How does the chemical reactivity of alkali metals vary on going in group 1 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?
Explain why All the elements of a period have different chemical properties.
On the basis of electronic configuration, how will you identify the first element of a period?
What are the periods in a periodic table? Give two characteristics of each.
What are horizontal rows and vertical columns in a periodic table known as?
Name two elements in halogens.
Name two elements in each case:
Transition element
Name the type of elements which have two outermost shell incomplete.
Answer the following in respect of element `31/15 P`
Give its electronic configuration
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Write a short note.
Structure of the modern periodic table.
The horizontal rows in a periodic table are called _____.
Give the symbol and valency of the following element and radical.
Sodium
Give the symbol and valency of the following element and radical.
Magnesium
Give the chemical formula of sodium bicarbonate
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Write scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
______ is the longest period in the periodical table.
The element which has the least tendency to lose electrons is ______
Which one of the following elements exhibit maximum number of valence electrons?
Spot the error:
The elements of group 13 are called the carbon family.
Spot the error:
There are 5 periods and 17 groups in the modern periodic table.
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 |
Write the molecular formula of the compound formed by the combination:
A and F
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?
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
An element belonging to 3d series of modern periodic table has spin magnetic moment = 5.92 B.M. in +3 oxidation state. The atomic number of elements are ______.
An element has 2 electrons in its N shell.
State its position in periodic table.
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
