Question

1. you just determined that the isotope rubidium - 85 is most abundant in nature.

write the symbol for this isotope.
choices: reset
85 87 37 85.47

Explanation:

Step1: Identify the atomic number of rubidium

From the periodic table, the atomic number of rubidium (Rb) is \(37\).

Step2: Write the isotope symbol

The general form of an isotope symbol is \(_{Z}^{A}\text{X}\), where \(Z\) is the atomic number and \(A\) is the mass number. For rubidium - 85, \(A = 85\) and \(Z=37\). So the symbol is \(_{37}^{85}\text{Rb}\).

Answer:

\(_{37}^{85}\text{Rb}\)