Question

3.36 What element fits each description? a. a period 3 element that forms an ion with a -1 charge b. an ion from group 2A with 36 electrons c. an ion from group 6A with 18 electrons 3.37 Whu da

Answer 1

(a). Chlorine (Cl)

(b). Sr²⁺

(c). S^2-

^{a) chlorine(cl) b) Sr^2 + c)S^2 - a) Halogen are the elements in the periodic table that form ions with - 1 change. The only halogen in period 3 is chlorine so, the period 3 element that forms an ion with - 1 change is chlorine b) Strontium (Sr) is a group 2A element with 38 electrons it forms Sr^2 + ion by the loss of 2 electrons . so after forming Sr^2 + ion, the electron in Sr^2 + becomes 38 - 2 = 36 electrons . Hence the group 2A ion with 36 electrons is Sr^2 + c) Sulphur(s) is group 6A element with 16 electrons ehen it forms S^2 - ION, THE NO.OF ELECTRON = 16 + 2 = 18 Hence, group 6A ion with 18 electrons is S^2 -}