The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?

A and B

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B and D

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A and C

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D and E

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Solution

The correct option is C A and C
Elements A and C have electrons in thier valence shell . All the elements which belong to the same group should have same number of valence electrons

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Q. Question 7
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?

(a) A and B
(b) B and D
(c) A and C
(d) D and E

The elements A, B, C, D and E have atomic numbers 9, 11, 17, 12 and 13 respectively. The which belongs to the same group of the periodic table is :

(a) A and B (b) B and D (c) A and C (d) D and E

Q. The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belongs to the same group?

Five elements A, B, C, D and E have atomic numbers of 2, 3, 7, 10 and 18 respectively. The elements which belong to the same period of the periodic table are :

(a) A, B, C (b) B,C,D (c) A, D, E (d) B, D, E

Q. Question 6
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?

(a) A, B, C
(b) B, C, D
(c) A, D, E
d) B, D, E

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The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?

The correct option is C A and CElements A and C have electrons in thier valence shell . All the elements which belong to the same group should have same number of valence electrons

The correct option is C A and C
Elements A and C have electrons in thier valence shell . All the elements which belong to the same group should have same number of valence electrons