Question

use the periodic table to determine which of the following could be an isotope of bromine (br). check all that apply. z = 79, a = 196 z = 35, a = 79 a = 79, n = 44 z = 44, n = 44 done

Explanation:

Step1: Recall Isotope Definition

Isotopes of an element have the same atomic number (\(Z\), number of protons) but different mass numbers (\(A\), sum of protons and neutrons, \(A = Z + N\), where \(N\) is neutrons). For bromine (Br), the atomic number \(Z = 35\) (from periodic table).

Step2: Analyze Each Option

• Option 1 (\(Z = 79, A = 196\)): \(Z = 79\) ≠ 35 (Br's \(Z\)), so not Br isotope.
• Option 2 (\(Z = 35, A = 79\)): \(Z = 35\) (matches Br's \(Z\)), so possible isotope (same \(Z\), different \(A\) than other Br isotopes).
• Option 3 (\(A = 79, N = 44\)): Calculate \(Z = A - N = 79 - 44 = 35\) (matches Br's \(Z\)), so possible isotope.
• Option 4 (\(Z = 44, N = 44\)): \(Z = 44\) ≠ 35, so not Br isotope.

Answer:

• \(Z = 35, A = 79\)
• \(A = 79, N = 44\)