Hello to answer your question fully
<span>Archaebacteria
Because, </span><span>Archaebacteria is the oldest type of bacteria, which exist at the beginning of the world back when Oxygen still hasn't exist in its environment
Signed by, Expert Sargedog</span>
A particle having 9 protons, 9 neutrons, and 10 electrons, because ions are atoms that have lost or gained one electron
