1) This is the negatively charged subatomic particle a) Proton b) Electron c) Neutron d) Atom 2) It has no electrical charge. a) Proton b) Electron c) Neutron d) Atom 3) I am a positively charged subatomic particles a) Proton b) Electron c) Neutron d) Atom 4) What do you the particles that are present to most basic level in everything we see around? a) Proton b) Electron c) Neutron d) Atom 5) He discovered proton. a) J. J. Thomson b) E. Goldstein c) J. Chadwick d) J. Dalton

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?