Question

Рассчитайте число протонов и нейтронов в ядре атома технеция (изотоп с атомной массой 99)и ядре атома радия(изотоп с атомной массой 226)

Answer 1

Прикрепила...................

Answer 2

Calculating Protons and Neutrons in the Nuclei of Technetium and Radium Isotopes

To calculate the number of protons and neutrons in the nuclei of the given isotopes, we'll use the atomic mass and atomic number of each element.

Technetium Isotope (Atomic Mass 99): - Atomic number of technetium (Tc) = 43 - Atomic mass of technetium (Tc) = 99

The number of protons in the nucleus of technetium is equal to its atomic number, which is 43. To find the number of neutrons, we can subtract the atomic number from the atomic mass: - Number of neutrons in the nucleus of technetium = Atomic mass - Atomic number = 99 - 43 = 56

Radium Isotope (Atomic Mass 226): - Atomic number of radium (Ra) = 88 - Atomic mass of radium (Ra) = 226

The number of protons in the nucleus of radium is equal to its atomic number, which is 88. To find the number of neutrons, we can subtract the atomic number from the atomic mass: - Number of neutrons in the nucleus of radium = Atomic mass - Atomic number = 226 - 88 = 138

Therefore, the number of protons and neutrons in the nuclei of the technetium isotope (atomic mass 99) and the radium isotope (atomic mass 226) are as follows: - Technetium: 43 protons and 56 neutrons - Radium: 88 protons and 138 neutrons