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प्रश्न
Name the elements in period 1.
उत्तर
Elements in period 1 are Hydrogen (H) and Helium (He).
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संबंधित प्रश्न
Two elements ‘A’ and ‘B’ belong to the 3rd period of Modern periodic table and are in group 2 and 13, respectively. Compare their following characteristics in tabular form:-
(a) Number of electrons in their atoms
(b) Size of their atoms
(c) Their tendencies to lose electrons
(d) The formula of their oxides
(e) Their metallic character
(f) The formula of their chlorides
How do the valency and the atomic size of the elements vary while going from left to right along a period in the modern periodic table?
An element X belong to 4th period and 17th group, state.
Write the formula of the compound formed when it reacts with `(27)/(13) y `
The following questions refer to the Periodic Table.
What is the common feature of the electronic configurations of the elements in group 7?
Arrange the following as per instruction given in the bracket.
Mg, Cl, Na, S, Si (decreasing order of atomic size)
Moving down in the second group, number of valence electrons ______.
Based on the group valency of element write the molecular formula of the following compound giving justification:
Halide of the elements of group thirteen
State the property trends in general of elements on moving down in a group of the periodic table.
State the following:
The group which contains highly electropositive metals including sodium.
Electron Affinity is maximum in ______.
