Question

27. When a solid converts directly to the gas phase, the process is called sublimation. boiling. condensation. deposition. 28. Which atom requires the least energy to remove an electron from its valence shell?! a) F b) al c) Br d) 29. How many atoms are in 22.3 g of iron (Fe)? a) 2.40 x 1023 atoms b) 1.51 x 1024 atoms c) 1.34 x 1025 atoms d) 7.50 x 1024 atoms

Answer 1

(27) When a solid converts directly to the gas phase, the process is called a @ Sublimation: (28) which atom requires the least energy to remove an electron from it's valence shell ? gns: @ I Explanation : as ne go up to the ingroup, - Jonization energy increases. so it means requirement of figh energy to remove an eo from it's valance Shell, mole of Fe = 22.3 = 0.399 55-895 mo of atoms - 0-399x 6.093 x1093 = 9.403x1023 atoms Ans: @ 2.40X1023 atoms