Final answer:
The answer is D) 119.0 amu. The atomic number of Tin is 50 and the number of neutrons is 68, so the mass number of this isotope is 118. atomic number of an element represents the number of protons in its nucleus, while the mass number is the sum of the number of protons and neutrons in the nucleus.
Step-by-step explanation:
The atomic number of an element represents the number of protons in its nucleus, while the mass number is the sum of the number of protons and neutrons in the nucleus. In the case of Tin (Sn), the atomic number is 50 and the number of neutrons is 68. Therefore, the mass number of this isotope of Tin is 50 + 68 = 118. The answer is D) 119.0 amu.
The answer is D) 119.0 amu. The atomic number of Tin is 50 and the number of neutrons is 68, so the mass number of this isotope is 118. atomic number of an element represents the number of protons in its nucleus, while the mass number is the sum of the number of protons and neutrons in the nucleus.