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प्रश्न
Which of the following statements about the Modern periodic table is correct?
पर्याय
18 horizontal rows are known as Periods.
7 vertical columns are known as Periods.
18 vertical columns are known as groups.
7 horizontal rows are known as groups.
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उत्तर
18 vertical columns are known as groups. and 7 horizontal rows are known as groups.
Explanation:
The Modern Periodic Table is systematically organised as follows:
- Groups: There are 18 vertical columns known as groups.
- Periods: There are 7 horizontal rows known as periods.
APPEARS IN
संबंधित प्रश्न
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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−
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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?
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
Write the merits of the modern periodic table over Mendeleev’s Periodic table
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
What is the name of those elements which divide metals and non-metals in the periodic table?
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
Explain why all the elements of a group have similar chemical properties.
From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
What are the groups in a periodic table? Give two characteristics of each.
Give the group number of following elements present in periodic table
Name the scientist who stated the modern periodic law.
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
Name two elements in Alkaline earth metals.
What do you understand by typical elements?
Name the type of elements which have one electron short of octet.
What is the number of elements in the 1st period?
What is the number of elements in the 3rd period, of the modern periodic table?
Name an element of group 18 which can form compounds.
Answer the following question.
How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Bisulphite
Give the chemical formula of sodium hydroxide
Give the chemical formula of calcium phosphate
______ is the longest period in the periodical table.
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
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).
______ group elements are called alkaline earth metals.
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
Define periods of modern periodic table.
An element with atomic number ______ will form a basic oxide.
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
Answer the following in respect of element \[\ce{_16^32S}\].
To which group and period does it belong?
Match the atomic number with the following:
An element of group 2.
