Question

Name and describe the composition of the three hydrogen isotopes (Select all that apply.) H, protium: 1 proton, 1 electron, 1 neutron U H, tritium: 1 proton, 1 electron, 2 neutrons H protium: 1 proton, 1 electron H, protium: 1 proton, 1 electron. 3 neutrons 1H, deuterium: 1 proton, 1 electron, 1 neutron H tritium: 1 proton, 1 electron, 1 neutron H. tritium: 1 proton, 1 electron. 2 neutrons

Answer 1

electron proton neutron 1 1 H = protium 1 1 0 2 1 H - Deuterium 1 1 1 3 1 H rightarrow Tritium 1 1 2 2) Cobalt: M _ z C o Atomic number = no . Of e ^- = mo . Of proton Z = 27 M = mass number = no . Of e ^- = no . Of neutron Therefore 1) neutron = 30 , Z = 27 M = 27 + 30 = 57 57 _ 27 C o 2) neutron = 31 , Z = 27 , M = 58 58 _ 27 C o 3) neutron = 33 , z = 27 , M = 60 60 _ 27 C o 3) Atomic mass of 16 _ O = 15 . 995 g = 1 mole 1 mole of 16 _ O = 6 . 023 times 10 ^23 16 _ o atoms Therefore mass of one 16 _ o atom = 15 . 995/6 . 023 times 10 ^23 = 2 . 65 times 10 ^- 23 g a) Technetium - 99 Atomic number = 43 Rightarrow 1) no . of e ^- = no . of p = 43 [e ^- = electron , p = proton , n = neutron] Mass number = 99 no . of ' n ' = M - Z = 99 - 43 n = 56