Question

31) Which pair of elements would you espect to eshilbit thegraes similarity in their physical and chemical properties? A) TL C) Se. Te D) In, Sb 32) How many electrons does the As-ion possess A) 2 B) 30 C)s D) 33 32) E) 36 33) Which of the following compounds would you expect to be lonich 33) B) NH3 C) LiBr D) H202 E) None of the above 34) The charge on the copper ion in the salt CuO is C) 3 A)+1 B) +2 34) D) .5 E)+4 35) Oxygen is a and nitrogen is a 35) A) metal, metalloid B) nonmetal, metal C) nonmetal, metalloid D) metalloid, metalloid E) nonmetal, nonmetal 36) What is the formula of the compound formed between strontium ions and nitrogen ions? 36) A) Sr3N2 B) SrN2 C) SEN D) Sr2N3 E) SrN3 37) Calcium forms an ion with a charge of 37) A) 2. C) o D) 1- E)2- 38) Iodine forms an ion with a charge of 38) A) 2- C)1- D) 7- 39) Of the following, onlyis a chemical reaction. A) dissolving sugar in water B) melting of lead C) crushing of stone D) dropping a penny into a glass of water E) tarnishing of silver 40) The correct answer (reported to the proper number of significant figures) to the following is 1501-1496)-(9.18-3.68 41) 41) Round the number 0.00637 to two significant figures E) 0.00637 C)0.006 D) 0.0064 A) 0.0 B)0.0063700

Answer 1

Ans 31 : C) Se, Te

The elements that have same valence shell electron configuration are similar in their physical and chemical properties.

So here :

Selenium and Tellurium belong to the same group and their properties are also similar with almost similar decay patterns.