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Successions that occur on soils or areas...

Successions that occur on soils or areas which have recently lost their community are referred to as

A

primary successions

B

secondary successions

C

lithoseres

D

priseres

Text Solution

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The correct Answer is:
B
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Numerous forms of the periodic table have been devised from time to time. A modern version which is most convenient and widely used is the long or extended from of periodic table. The aufbau principle and the electronic configuration of atoms provide a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consists of 8, 8,18, 18 and 32 elements respectively. The seventh period is incomplete and like the sixth period would have maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or families. According to the recommendations of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA, ....VIIA, VIII, IB.....VIIB. Each successive period in the periodic table is associated with the filling up next higher principal energy level following aufbau sequence. The number of elements in each period is twice the number of atomic orbitals available in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block, and f-block depending on the type of atomic orbitals that are being filled with electrons. An element belongs to group 17 with atomic number is 17. What is the atomic number of the element belonging to same group and present in fifth period?

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AAKASH SERIES-ECOSYSTEM-EXERCISE-II (PLANT SUCCESSION)
  1. Species that invade an area in secondary succession depend on

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  2. Primary succession refers to development of communities on a

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  3. Successions that occur on soils or areas which have recently lost thei...

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  4. In lithosere, foliose lichens make the conditions favourable for the g...

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  5. Select the correct sequence of succession in a pond.

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  6. Correct sequence of stages of succession on a bare rock is

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  7. Match Column-I with Column-II and select the correct option from the c...

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  8. Read the following statements and select the correct option: (a) Pi...

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  9. Correct sequence of stages of succession on a bare rock is

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  10. In the given figure, A, B, C, D, E and F represent some stages of hydr...

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  11. An ecosystem which can be easily damaged but can recover after some ti...

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  12. Match the following columns

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  13. The correct sequence of plants in a hydrosere is

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  14. The second stage of hydrosere is occupied by plants like

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  15. Which one of the following statements is correct for secondary success...

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  16. Given below are some of the stages of the hydrarch A) Marsh meadow s...

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  17. Which of the following is considered as pioneer community in xerarch?

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  18. Match Column-I with Column-II and select the correct option from the c...

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  19. Match Column-I with Column-II and select the correct option from the c...

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  20. Biotic succession is caused by

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