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प्रश्न
State the property trends in general of elements on moving from left to right in a period of the periodic table.
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उत्तर
Property trends of elements from left to right in a period:
- Number of electron shells remains the same.
- Valence electrons increase by one.
The transition from metallic to non-metallic character increases. - Size of atom decreases.
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संबंधित प्रश्न
Given below are some elements of the modern periodic table. Atomic number of the element is given in parentheses.
A(4), B(9), C(14), D(19), E(20)
(a) Select the element that has one electron in the outermost shell. Also, write the electronic configuration of this element.
(b) Which two elements amongst these belong to the same group? Give reasons for your answer.
(c) Which two elements amongst these belong to the same period? Which one of the two has bigger atomic radius?
How do electronic configurations of elements change in second period of periodic table with increase in atomic numbers?
Fill in the blank in the following statement:
On going down in a group in the periodic table, the metallic character of elements ...............
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.
Correct the statements.
Elements in the same periods have equal valency.
An element X belong to 4th period and 17th group, state.
name of the element.
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 `
Select the correct answer
Most reactive character among the elements given below is found in
The following questions refer to the Periodic Table.
Name the first and last element in period 2.
Based on the group valency of element write the molecular formula of the following compound giving justification:
Halide of the elements of group thirteen
