A) 4 B) 2 C) 3 D) 1
A) proton B) element C) electron D) neutron
A) proton B) neutron C) element D) electron
A) electron B) neutron C) proton D) element
A) neutron B) heart of the atom C) nucleus D) electron cloud
A) positive B) both positive and negative C) negative D) neutral (no charge)
A) both positive and negative B) negative C) neutral D) positive
A) both the nucleus and the electron cloud B) heart of the atom C) nucleus D) electron cloud
A) Chadwick B) Bohr C) Thomson D) Dalton
A) Thomson B) Dalton C) Rutherford D) Democritus
A) Rutherford B) Dalton C) Thomson D) Democritus |