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प्रश्न
Find the odd one out and give its explanation.
विकल्प
Carbon
Calcium
Oxygen
Neon
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उत्तर
Calcium
Explanation-
Calcium is a s-block element while others are p-block elements.
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संबंधित प्रश्न
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
How many periods and groups are there in the long form of periodic table?
Give two example of group 18 elements.
What is the significance of atomic number in the modern classification of elements? Explain with the help of an example.
How were the positions of cobalt and nickel resolved in the modern periodic table?
The three elements having chemical symbols of Si, B and Ge are:
(a) all metals
(b) all non-metals
(c) all metalloids
(d) Si is metalloid, B is metal and Ge is non-metal
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
Which of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
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 type of elements which have outermost shell complete.
Name the type of elements which have one electron short of octet.
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
The horizontal rows in a periodic table are called _____.
Give the symbol and valency of the following element and radical.
Zinc
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Ammonium
Give the symbol and valency of the following element and radical.
Bicarbonate
State what is meant by the term chemical formula.
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
State the number of elements in Period 3 of the Periodic Table.
What are the elements.
What are the periods in a periodic table?
The d-block elements are called as _______ elements.
Write an Explanation.
Period
Noble gases belong to______ group of the periodic table.
______ is the longest period in the periodical table.
The longest period of the Modern Periodic Table is period.
The inert gas which lies in the third period is ______
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 same valency as Lithium.
Noble gases are placed in the ______ group in the modern periodic table.
What is the general name of the last elements of the Periodic Table?
Answer the following in respect of element \[\ce{_16^32S}\].
To which group and period does it belong?
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
Match the atomic number with the following:
A rare gas.
Give reason for the following:
Inert gases do not form ion.
