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प्रश्न
Find the odd one out and give its explanation.
विकल्प
F
K
Cl
I
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उत्तर
K
Explanation-
K is placed in group 1 while others are placed in group 17 of the modern periodic table.
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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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.
How many rows and columns are there in the modern periodic table?
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
What is meant by a group, in a periodic table?
What is meant by a period, in a periodic table?
Which element has two shells, both of which are completely filled with electrons?
What is a period in a periodic table?
What are the groups in a periodic table? Give two characteristics of each.
Name the type of elements which have outermost shell complete.
How will the tendency to gain electrons change as we go from left to right across a period? Why?
Write a short note.
Structure of the modern periodic table.
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
An element A has 2 electrons in its fourth shell. State its electronic configuration.
Give the symbol and valency of the following element and radical.
Zinc
Give the symbol and valency of the following element and radical.
Carbonate
Give the chemical formula of ammonium sulphate
Fill in the blank:
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group ______.
What are the periods in a periodic table?
The groups 1 and 2 constitute the _______ block.
Find the odd one out and give its explanation.
p-block is composed of groups 1 and 2.
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element. Explain.
What are groups and periods in the modern periodic table?
In the modern periodic table, elements are arranged according to their ______
The longest period of the Modern Periodic Table is period.
What is the symbol of the element Tungsten?
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.
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
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.
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.
Give the criteria on the basis of which elements are placed (i) in a group and (ii) in a period in the modern periodic table. The atomic number of an element is 16. According to the criteria, in which group and period it should be placed?
Name the metalloids in the first twenty elements.
Name the following metal:
A metal present in period 3, group 1 of the 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 formula with hydrogen.
