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