Answer all assigned questions and problems and show all work.What is the mass nu

Answer all assigned questions and problems and show all work.What is the mass number of an iron atom that has 28 neutrons?Calculate the number of neutrons of239Pu.Write the appropriate symbol for each of the following isotopes: (a)Z= 11A= 23; (b)Z= 28A= 64Define with two examples the following terms: (a) alkali metals (b) alkaline earth metal (c) halogens and (d) noble gases. Identify the following as elements or compounds: (a) NH3 (b) N2 (c) CO (d) Co and (e) He. Give the numbers of protons and electrons in each of the following: (a) Na+ (b) Ca2+ (c) Al3+ (d) I (e) O2 (f) N3 and (g) He.Write the molecular formula of glycine an amino acid present in proteins. Carbon = 2 atomsHydrogen = 5 atomsNitrogen = 1 atomOxygen = 2 atoms.(3 points)Which of the following compounds are likely to be ionic? Which are likely to be molecular? (a) SiCl4 (b) LiF (c) BaCl2 (d) B2H6 (e) KCl and (f) C2H4What is the difference between inorganic compounds and organic compounds?Name the following compounds.Na2CrO4K2HPO4HBr (gas)HBr (in waterLi2CO3K2Cr2O7FeOPF3NH4NO2Al(OH)3TiCl4CuSO4 5H2OWrite the formulas for the following compounds:rubidium nitritepotassium sulfidecalcium hydrogen phosphateiodine heptafluorideammonium sulfatecopper (II) nitritecalcium hydroxidedihydrogen sulfidesodium hydrideThe following table gives the number of electrons protons and neutrons in atoms or ions of four elements identified only as A B C and D. Write the isotopic symbol for each element.(8 points)ElementNo. of protonsNo. of electronsNo. of neutronsIsotopic symbolA555B7107C191820D302836