(4.03_Q3) Neutral atoms of the same element can have different numbers of O protons
neutrons
electrons
Alfs

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

A.(nh4)(2co3)is the correct answer