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प्रश्न
What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?
विकल्प
Cu, Fe, Zn, Al
Al, Cu, Fe, Zn
Zn, Al, Cu, Fe
Fe, Zn, Al, Cu.
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उत्तर
Cu, Fe, Zn, Al
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संबंधित प्रश्न
Why do all the elements of the same group have similar properties?
How were the positions of isotopes of an element decided in the modern periodic table?
On which side of the periodic table will you find metals?
On which side of the periodic table will you find non-metals?
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
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
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?
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
What are the periods in a periodic table? Give two characteristics of each.
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
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
Define:
Periodic table
How many groups and periods does the modern periodic table have?
Name two elements in each case: Lanthanides
Name the type of elements which have one electron short of octet.
Arrange the elements of second and third periods in increasing order of their atomic size.
Third Period.
Name an element of group 18 which can form compounds.
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
Give the symbol and valency of the following element and radical.
Magnesium
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
Give the symbol and valency of the following element and radical.
Carbonate
Give the chemical formula of sodium hydroxide
State the number of elements in Period 1 of the Periodic Table.
State the number of elements in Period 2 of the Periodic Table.
What are the elements.
Find the odd one out and give its explanation.
p-block is composed of groups 1 and 2.
Write an explanation.
Period
Distinguish between:
s-block - p-block
Elements in the modern periodic table are arranged in ______groups and______ periods.
The arrangement of elements in the Modern Periodic Table is based on their ______.
Element ‘X’ forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely be in the same group of the periodic table as: ______
What is the symbol of the element Tungsten?
Which of the following statements about the Modern Periodic Table is correct:
Which one of the following elements exhibit maximum number of valence electrons?
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
What is the general name of the last elements of the Periodic Table?
