6. Who stated the Law of Octaves'?
a. Johann Wolfgang Dobereneir
b. Dmitri Mendeleev
John Alexander Newlands
d. John Dalton

7. Which of the following is more massive?
a. proton and electron
c. proton and neutron
b. electron and neutron
d. proton only

8. The gradual wearing away of a metal due to the interaction with the other substances is
called
a. smelting
b. melting
C. corrosion
d. luster

9. The ease and speed with which a metal reacts with another substance is called?
a ionization energy
c. malleability
b. reactivity
d. ductility

10. What experiment led to the discovery of nucleus?
a. cathode ray tube experiment
b. electric discharge tube experiment
c. alpha particle scattering experiment
d. None of the above​