1. Understand Beryllium's Composition
* Atomic Number (Z): Beryllium has an atomic number of 4, meaning it has 4 protons in its nucleus.
* Mass Number (A): Beryllium's most common isotope has a mass number of 9. This means it has 9 total protons and neutrons in its nucleus.
* Neutrons: Since mass number (A) = protons + neutrons, beryllium has 9 - 4 = 5 neutrons.
* Electrons: In a neutral atom, the number of electrons is equal to the number of protons. So, beryllium has 4 electrons.
2. Calculate for Two Atoms
* Protons: 2 atoms * 4 protons/atom = 8 protons
* Neutrons: 2 atoms * 5 neutrons/atom = 10 neutrons
* Electrons: 2 atoms * 4 electrons/atom = 8 electrons
3. Total Subatomic Particles
* Total subatomic particles in 2 beryllium atoms = 8 protons + 10 neutrons + 8 electrons = 26 subatomic particles
