Written Assignment 2: Atomic Structure and Chemical CompoundsAnswer all assigned questions and problems, and show all work.1.What is the mass number of an iron atom that has 28 neutrons?(3 points)(Reference: Chang 2.13)
2.Calculate the number of neutrons of239Pu.(3 points)
3.Write the appropriate symbol for each of the following isotopes: (a)Z= 11,A= 23;(b)Z= 28,A= 64(6 points)A ) 23Na11B)64Ni28(Reference: Chang 2.17)4.Define, with two examples, the following terms: (a) alkali metals, (b) alkaline earthmetal, (c) halogens, and (d) noble gases.(8 points)a)Li & Nab)Be & Mgc)F & Cld)He & Ne(Reference: Chang 2.22)5.Identify the following as elements or compounds: (a) NH3, (b) N2, (c) CO, (d) Co,and(e) He.(5 points)A) CompoundB) ElementC) CompoundD) CompoundE) Element1Copyright © 2017 by Thomas Edison StateUniversity. All rights reserved.
