Which elements stable state consists of groups of 8?
S, F, Ar, or P
Answer: S(sulphur)
Sulphur exhibits S8 molecular state in its elemental state.
Which atom and/or ion is (are) isoelectronic with Cl: F +, P, Al2−, Ar+, S−, B3−? (Select all that apply.) F + P Al2− Ar+ S− B3−
So Sort the following atoms or ions into isoelectronic groups: Nº, Ar, F., Ne, P), Ca'?, A1", Sr", Nat!, S?, CI", 0?, K, Mg?
8) Which of these pairs consists of isoelectronic species? A) Mn2 and Ar B) Zn2 and Cu2 C) Na and K D) C-and S E) K and C 9) Which of these choices is the electron configuration for the aluminum ion? A) 1s22s22p 3s2 B) 1s 2s22p 3s23p2 c) 1s22s22p 3s23p D) 1s22s22p E) 1s22s22p 3s23p 10) Which of the following is the correct ground-state electron configuration for Ti?-? A) [Ar4s23d2 B) [Ar]4s23d C) [Ar14s D) [Ar 3d2 E) [Ar...
(1) Let p be a prime number. Describe all the groups with p elements. (2) Let # be a permutation in S(4). What are the possible orders of T according to Lagrange's theorem? (3) Show that there are no elements of order 8 in S(4) (even though 8 divides 24 = 4!).
. Which of the following elements is most chemically similar to sulfur? a. Ar b. P c. Po d. Se e. Sn
write the electron dot diagram for the following elements H F Ar. K. S. Mg. Be. Cl
A sample contains 92% stable 40 Ar and 8 % unstable 39 Ar. The half life of the unstable 39 Ar is 270 years. Calculate the activity (the number of decay per second) for one gram of this sample. (8%) Answer:
1.) Among elements 1–18, which element or elements have the smallest effective nuclear charge if we use the equation Zeff=Z?S to calculate Zeff? H, Li, Na, He, Be, Mg, B, Al, C, Si, N, P, O, S, F, Cl, Ne, Ar 2.) Which element or elements have the largest effective nuclear charge? H, Li, Na, He, Be, Mg, B, Al, C, Si, N, P, O, S, F, Cl, Ne, Ar
State where in the periodic table these elements appear: Part A elements with the valence-shell electron configuration ns2np5 Part B elements that have three unpaired p electrons Part C an element whose valence electrons are 4s24p1 Express your answer as the group and period number separated by a comma. Part D the d-block elements: groups 3-8, groups 3-12, groups 1-2, Lanthanides, or Actinides
7. Which element has the following electron configurations? lon: [Ar]3d10 lon (-1 charge): [Kr]5s4d105p6 8. Write the following in order of increasing size As O Br Br Na Rb Te²- F- 02- 9. Arrange these elements in order of decreasing first ionization energy: CI, S, Sn, Pb 10. Choose the element with a more negative (exothermic) electron affinity in each pair: K or Cs Si or P Ga or Br Mg or s 11. a) Which has a higher ionization...