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प्रश्न
Define groups of modern periodic table.
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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.
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संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
The position of three elements A, B and C in the Periodic Table are shown below –
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Group 16
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Group 17
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A
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B
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C
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(a) State whether A is a metal or non-metal.
(b) State whether C is more reactive or less reactive than A.
(c) Will C be larger or smaller in size than B?
(d) Which type of ion, cation or anion, will be formed by element A?
How many rows and columns are there in the modern periodic table?
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
On which side of the periodic table will you find non-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
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
Which element has the electronic configuration 2, 8, 2?
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?
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
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 happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
What are the advantages of the periodic table?
What are the periods in a periodic table? Give two characteristics of each.
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
State the modern periodic law.
What is the number of elements in the 3rd period, of the modern periodic table?
Give the symbol and valency of the following element and radical.
Zinc
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
Give the symbol and valency of the following element and radical.
Carbonate
Give the symbol and valency of the following element and radical.
Sulphate
Group 1 and 2 : s block : : group 13 and 18 : _______
Find the odd one out and give its explanation.
The modern periodic table has 1 to 7 periods.
______ is the longest period in the periodical table.
The amount of energy released when one or more electrons is added to the neutral atom is ______
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?
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
The maximum number of electrons that can be accommodated in s, p,d, and f subshells are ______.
Spot the error:
The elements of group 13 are called the carbon family.
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.
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 ______.
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
Name the metalloids in the first twenty elements.
Answer the following in respect of element \[\ce{_16^32S}\].
To which group and period does it belong?
