Imagine that you have for food dyes to test a, b,c and d. imagine that you are going to investigate which food dye diffuse most quickly. which variable will you change?

The answer options is d

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

The correct answer is "atomic weight".