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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
In the Modern Periodic Table, which are the metals among the first ten elements?
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
Fill in the following blank with suitable word:
Group 18 elements are called ...............
How many periods and groups are there in the long form of periodic table?
What is the significance of atomic number in the modern classification of elements? Explain with the help of an example.
On which side of the periodic table will you find metals?
How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
On the basis of electronic configuration, how will you identify the first element of a period?
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
What is a group in the periodic table?
What are the periods in a periodic table? Give two characteristics of each.
An element X belongs to 3rd period and group 2 of the periodic table. State:
(a) number of valence electrons
(b) valency
(c) metal or non-metal
(d) name of the element
Define:
Periodic table
Name the scientist who stated the modern periodic law.
Name two elements in Alkali metals.
State its position in the periodic table?
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
What will be the formula of its phosphate?
State the modern periodic law for the classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
State the modern periodic law.
How many periods and groups are there in the modern periodic table?
Give the symbol and valency of the following element and radical.
Hydrogen
Give the symbol and valency of the following element and radical.
Calcium
Give the symbol and valency of the following element and radical.
Nitrate
Which of the following statements about the Modern periodic table is correct?
Explain structure of modern periodic table in short.
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.
______ forms the basis of the modern periodic table.
On moving from left to right in a period in the periodic table, the size of the atom ______
An element which is an essential constituent of all organic compounds belongs to
Which of the following is the outermost shell for elements of period 2?
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
- Identify the element X
- Write the electronic configuration of X
- Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
- What would be the nature (acidic/ basic) of oxides formed?
- Locate the position of the element in the Modern Periodic Table.
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
An element with atomic number ______ will form a basic oxide.
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.
What is the general name of the last elements of the Periodic Table?
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
