Question

how many protons does a neutral atom of aluminum have? only type the number your answer who defined atoms using the greek word \atomos\ meaning indivisible? * choose

Explanation:

1. The atomic number of aluminum is 13. In a neutral atom, the number of protons is equal to the atomic number. So, a neutral atom of aluminum has 13 protons.
2. The ancient Greek philosopher Democritus defined atoms using the Greek word "Atomos" meaning indivisible.

Answer:

1. 13
2. Democritus