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NCERT Class X Science Class: Chapter β 5. Periodic Classification of Elements β Part-3
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 and B
- B and D
- A and C
- D and E
Answer: C
Question 8:
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
- Group 8
- Group 2
- Group 18
- Group 10
Answer: C
Question 9:
An element which is an essential constituent of all organic compounds belongs to
- Group 1
- Group 14
- Group 15
- Group 16
Answer: B
Question 10:
Which of the following is the outermost shell for elements of period
- K shell
- L shell
- M shell
- N shell
Answer: B
Question 11:
Which one of the following elements exhibit maximum number of valence electrons?
Answer: D
Question 12:
Which of the following gives the correct increasing order of the atomic radius of O, F and N?
Answer: D
Question 13:
Which among the following elements has the largest atomic radius?
Answer: C