Question

An isotope of yttrium has 39 protons and 59 neutrons. what is the atomic mass of that isotope?

Answer 1

The atomic mass of the yttrium isotope with 39 protons and 59 neutrons is 98 amu.

Step-by-step explanation:

The atomic mass of an isotope is calculated by adding the number of protons and neutrons in the nucleus. The atomic mass of an element is the weighted average mass of all the isotopes of that element. The atomic mass of an isotope is calculated by adding the number of protons and neutrons in its nucleus. In this case, the isotope of yttrium has 39 protons and 59 neutrons, the atomic mass can be calculated as follows:

Atomic mass = Number of protons + Number of neutrons
Atomic mass = 39 + 59
Atomic mass = 98

Therefore, the atomic mass of this yttrium isotope is 98 amu (atomic mass units).

Answer 2

we can define atomic mass the total of number of protons and number of neutrons in an atom or isotope.
So when an isotope of yttrium has 39 protons and 59 neutrons, its atomic mass is equal to;
number of protons + number of neutrons = 39 + 59 = 98