Advertisements
Advertisements
प्रश्न
Define groups of modern periodic table.
Advertisements
उत्तर
In the modern periodic table, groups (also known as families) are the 18 vertical columns that organize chemical elements by shared properties. Unlike periods, which are horizontal rows representing electron shells, groups are vertical columns of elements with similar chemical properties.
APPEARS IN
संबंधित प्रश्न
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.
How many periods and groups are there in the long form of periodic table?
Explain why, the noble gases are placed in a separate group.
Which element has two shells, both of which are completely filled with electrons?
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.
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
Name the scientist who stated the modern periodic law.
Name two elements in Alkaline earth metals.
What do you understand by typical elements?
Name the type of elements which have outermost shell incomplete.
Name the type of elements which have one electron short of octet.
State the main aim of classifying elements. Which is the more fundamental property of elements that is used in the development of Modern Periodic Table? Name and state the law based on this fundamental property. On which side of the periodic table one can find metals, non-metals and metalloids?
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
Give the symbol and valency of the following element and radical.
Sulphite
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Compare Modern Periodic Law with Mendeleev's Periodic Law.
Find the correlation:
Group 13 to 18 : p block : : ______ : d block
Right or wrong sentence.
To the left of the zig-zag line in the periodic table are the metal elements.
Elements in the modern periodic table are arranged in ______groups and______ periods.
State any five features of modern periodic table.
______ is the longest period in the periodical table.
The longest period of the Modern Periodic Table is period.
Explain the position of hydrogen in the 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 |
Which of the element is a Noble gas?
Explain giving reason why although the nuclear charge in atoms increases in moving from left to right in a period as well as in moving from top to bottom in a group in the Modern periodic table, but the size of the atoms does not vary similarly in both situations.
Select the appropriate options and complete the following paragraph:
(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).
On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.
State the group and period, of the element having three shells with three electrons in valence shell.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
Name the metalloids in the first twenty elements.
An element has 2 electrons in its N shell.
State its position in periodic table.
Match the atomic number with the following:
A rare gas.
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?
