The columns of the main transition element start with , 4b, 3b, 5b)

Yes :) elements in the central block. Groups 4B–8B, 1B, and 2B, or 4–12) in the periodic table, for example, iron, manganese, chromium, and copper :) hope this helps!

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom