A) transition metalts B) halogens C) alkali metals D) alkaline earth metals E) n

Question

A) transition metalts B) halogens C) alkali metals D) alkaline earth metals E) noble gases the outermost electrons of 16. Which of the following is the general electron configuration for clements in the alikaling carh rmerl lectron configuration for the outermost electroms of elements in the alkaline earth group? A) ns' B) ns D) ns'np Which of the following is the electron configuration for the bromi for the bromide ion? 17. A) [Arl c) [Kr] E) [Xe] 18. Which of the atoms listed below has the largest radius? A) CI B) I C) P D) Sb E) Se 19. Which of the following is an acidic oxide? A) P.0 B) MgO C) Fe:O D) K:O E) CoO 20. Consider the following reaction 2A+ -+2AF), what is the formula for the reaction product if we substitute sulfur for fluorine? A) A S B) A S: C) AS D) As E) AS Page 4

Explanation / Answer

15) b 7 A elements are callled haogens

haogen word came from greek ,halogens are named after therir property to react with metals to produce salts

16) and is b ns2

All members of the alkaline earth metal family have a valence electron configuration of s 2. This means that two electrons are involved in chemical bonding, and that these electrons move through an orbital, or range of probabilities, roughly corresponding to a sphere. The s orbital pattern corresponds to the first of several sub-levels within a principal energy level.

17) ans is c krypton Kr

the elctronic configartion of bromine is 1s22s22p63s23p64s23d104p5

so for bromide ion we have to add one electon so configeration will be 1s22s22p63s23p64s23d104p6 which will be similar to krypoton

18) ans id d)Sb because atomic radius increse as u move down the table and it will decrase as you move from left to right so comp-are to all other atom the position of sb is one whose atomic radius will be more

19)and is a) P4O10

Acidic oxides are the oxides of non-metals (groups 14-17). These acid anhydrides or acidic oxides form acids with water

so ans is a as they P is non metal

20) a) A2S3

sulfer has -2 charge though .it looks like A has +3 chrge due to final product with florine so it would be A2S3

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