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प्रश्न
Arrange the following as per instruction given in the bracket.
K, Pb, Ca, Zn (increasing reactivity)
उत्तर
K, Pb, Ca, Zn (increasing reactivity)
Pb < Zn < Ca < K
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संबंधित प्रश्न
The atomic radii of three elements X, Y and Z of a period of the periodic table are 186 pm; 104 pm and 143 pm respectively. Giving a reason, arrange these elements in the increasing order of atomic numbers in the period.
The atomic numbers of the elements Na, Mg, K and Ca are 11, 12, 19 and 20 respectively. The element having the largest atomic radius is:
(a) Mg
(b) Na
(c) K
(d) Ca
An element X belong to 4th period and 17th group, state.
name the family to which it belong.
What is meant by periodicity of elements?
How many elements are there in period 2?
Choose the correct answer from the choice given:
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An element Z has atomic number 16. Answer the following
(a) State the period and group to which Z belongs
(b) Is Z a metal or a non-metal?
(c) State the formula between Z and hydrogen.
(d) what kind of a compund is this?
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of the element in period 3 having atomic number 17.
Electron Affinity is maximum in ______.
There are three elements E, F, G with atomic numbers 19, 8 and 17 respectively.
Classify the above elements as metals and non-metals.
