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प्रश्न
The elements of one short period of the periodic table are given below in order from left to right:
| Li | Be | B | C | O | F | Ne |
Place the three elements fluorine, beryllium and nitrogen in the order of increasing electronegativity.
उत्तर
Be < N < F
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संबंधित प्रश्न
The atomic masses of three elements A, B and C having similar chemical properties are 7, 23 and 39, respectively.
- Calculate the average atomic mass of elements A and C.
- Compare the average atomic mass with atomic mass of B.
- What could the elements A, B and C be?
Based on the group valency of elements state the formula lot the following giving justification for each :-
(i) Oxides of 1st group elements,
(ii) Halides of the elements of group 13, and
(iii) Compounds formed when an element of group 2 combines with, an element of group 16.
Which element has a total of two shells, with three electrons in its valence shell?
What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?
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 3rd periods and group II of the periodic table state:
the valency,
Complete the following sentences.
The properties of the elements are a periodic function of their …………… (atomic number, mass number, reative atomic mass).
What will be the valency of an element of atomic number 9 (nine)?
The following questions refer to the Periodic Table.
What is the common feature of the electronic configurations of the elements in group 7?
What is meant by a Group in the Periodic Table?
