Question

which is correct for isotopes of the same element? (0.5 points) isotopes of the same element have the same atomic number but a different mass number. isotopes of the same element have the same mass number but a different atomic number. isotopes of the same element have the same relative atomic mass but a different mass number. isotopes of the same element have the same atomic number but a different relative atomic mass. 7 strontium (symbol sr) has four naturally occurring isotopes, sr - 84, sr - 86, sr - 87 and sr - 88 the relative atomic mass of strontium is 87.62. predict which of the four isotopes has the highest percent abundance. (0.5 points) sr - 88 sr - 84 sr - 87 sr - 86

Explanation:

1. Isotopes are defined as atoms of the same element with the same number of protons (atomic number) but different numbers of neutrons, resulting in different mass numbers. So for the first question, isotopes of the same element have the same atomic number but a different mass number.
2. For the second question, the relative - atomic mass is a weighted average of the masses of all naturally - occurring isotopes. Since the relative atomic mass of strontium (87.62) is closest to the mass number of Sr - 88 among the given isotopes, Sr - 88 has the highest percent abundance.

Answer:

1. Isotopes of the same element have the same atomic number but a different mass number.
2. Sr - 88