Question

what change has taken place in the following? k → k⁺
loss of a proton
gain of a proton
loss of an electron
gain of an electron

Explanation:

When an atom becomes a positively - charged ion, it loses an electron. Potassium (K) has a neutral charge. When it forms a potassium ion (K⁺), it has a positive charge. This occurs because it has lost one electron. Protons are in the nucleus and do not change during simple ion - formation processes.

Answer:

loss of an electron