Question

what is the difference between a bromine atom and a bromine ion? a bromine atom has 35 electrons, while a bromine ion has 34 electrons. a bromine atom has 35 protons, while a bromine ion has 36 protons. a bromine atom has 35 electrons, while a bromine ion has 36 electrons. a bromine atom has 35 protons, while a bromine ion has 34 protons.

Explanation:

• Protons: The number of protons in an element's atom and ion is the same as it's the atomic number (for bromine, atomic number \(Z = 35\)). So options with different proton numbers (B and D) are wrong.
• Electrons: A neutral atom has equal number of protons and electrons. A bromine ion (\(Br^{-}\)) gains one electron. So a bromine atom (\(Br\)) has 35 electrons and \(Br^{-}\) has \(35 + 1=36\) electrons.

Answer:

C. A bromine atom has 35 electrons, while a bromine ion has 36 electrons.