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प्रश्न
Consider two elements 'A' (Atomic number 17) and 'B' (Atomic number 19) :
(i) Write the positions of these elements in the modern periodic table giving justification.
(ii) Write the formula of the compound formed when 'A' combines with 'B.'
(iii) Draw the electron dot structure of the compound and state the nature of the bond formed between the two elements.
उत्तर
(i) Position of the elements in the periodic table:
| Element | Period | Group |
| A | 3 | 17 |
| B | 4 | 1 |
(ii)
Atomic number of A = 17
Electronic configuration A = 2,8,7
Number of valence electrons of A = 7
Valency of A = 8 - 7 = 1
Atomic number of B = 19
Electronic configuration B = 2,8,8,1
Number of valence electrons of B = 1
Valency of A = 1
So, the formula of the compound formed when elements A and B combine is BA.
(iii)
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संबंधित प्रश्न
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In which part of a group would you separately expect the elements to have the largest atomic size?
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Name two properties of elements whose magnitudes change when going from top to bottom in a group of the periodic table. In what manner do they change?
Which of the following set of elements is written correctly in the order of their increasing metallic character?
(a) Mg, Al, Si
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no of valence electrons in it
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Give the number of the group and the period of elements having three shells with three electrons in valence shell.
Answer the following question:
State the four blocks of the modern periodic table based on the electronic configuration of elements.
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