OO etisalat 39% D 11:30 AM adpoly.ankabut.ac.ae Question 11 (05 points) of the f
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OO etisalat 39% D 11:30 AM adpoly.ankabut.ac.ae Question 11 (05 points) of the following elements, has the most negative electron affinity. O Gee 120.5 points) Arrange the following elements in order of increasing effective nuclear charge: B As, P N.Sb N, As, P Bi, Sb O N, P As, Sb, Bi O Bi, As, P N, Sb O Bi, Sb, As, PN Question 13 (05 points) Order the following atoms from smallest to largest radi. Li,Be, K. N. O a Li, Be, K, N O Be, K. Li, N ON, Be, Li, K Li, K. N. Be O Be, Li, N. K Question 14 (05 points) The first ionization energies of the elements as you go from left to right across a period of the periodic table, and as you go from the to the bottom of agroup in the table. O increase, decrease O increase, increase O decrease, increase O decrease, decreaseExplanation / Answer
11. Among the elements Br has the most negative electron affinity.Because all the elements are present in 4th period and we know that the negative value of electron affinity increases along a period (Generally). Answer: d
12. The effective nuclear charge (Zeffor Z*) is the net positive charge experienced by an electron in a polyelectronic atom. The term "effective" is used because the shielding effect of negatively charged electrons prevents higher orbital electrons from experiencing the full nuclear charge of the nucleus due to the repelling effect of inner-layer electrons. The values of effective nuclear charge decrease down a group (although nuclear charge increases down a group, shielding effect more than counters its effect). Hence, the order of increasing effective nuclear charge is: Bi, Sb, As, P, N. Answer: d
13. Order of given atoms from smallest to largest radii: N, Be, Li, K. Answer: c
14. The first ionization energies of the elements increases as you go left to right across a period of the periodic table, and decreases as you go top to bottom of a group in the table. Answer: a
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