Chemistry Protons neutrons and Electrons 0.0 / 5 ? ChemistryAtomsGCSEEdexcel Created by: Mapp15rCreated on: 07-10-18 08:43 245316 Across 1. Found in the shells (9) 4. Maximum number of electrons in the second, third and fourth shell (5) 6. Maximum number of electrons in first shell (3) Down 2. Who created the periodic table (9) 3. In the nucleus with the protons (8) 5. Same as the Atomic mass number but not electrons (7)
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