A lemon juice cleans a penny. I believe this to be the answer because the lemon cleans the penny but no molecules change
Answer:
56
Explanation:
The mass number of an atom is a sum of its number of protons and neutrons. Iron (Fe) has an atomic number of 26. This means that it has 26 protons. Since we know it has 26 protons and are told it has 30 neutrons. The mass number of this atom of Iron is 26+30 = 56
Hope this helped!
The two things are hypothesis and empirical evidence
D. Kinda simple, don’t think much explaining is needed.
