Question

complete the table to determine the nuclear symbols for neutral atoms a and b. atom a: nuclear symbol (123, 51, dropdown), subatomic particles: protons: 51, neutrons: 72, electrons: 51. to which element does atom a belong? (dropdown). atom b: nuclear symbol (121, 51, dropdown), subatomic particles: protons: 51, neutrons: 70, electrons: 51. to which element does atom b belong? (dropdown). are atoms a and b isotopes of the same element? (yes because they have the same number of protons.)

Explanation:

Step1: Recall element identification rule

The element of an atom is determined by the number of protons (atomic number, \( Z \)). For both Atom A and Atom B, protons \( = 51 \).

Step2: Identify element with \( Z = 51 \)

The element with atomic number 51 is Antimony (Sb). Isotopes have the same \( Z \) (protons) but different mass numbers (protons + neutrons). Atom A: \( 51 + 72 = 123 \), Atom B: \( 51 + 70 = 121 \), same \( Z \), so isotopes.

Answer:

• Atom A belongs to Antimony (Sb).
• Atom B belongs to Antimony (Sb).
• Atoms A and B are isotopes (Yes, same protons).