John Dalton's Atomic Theory

According to Dalton's atomic theory, what are the smallest units of matter?

• Molecules

• Atoms

• Electrons

• Protons

What did Dalton propose about the formation of chemical compounds?

• Compounds are formed by the combination of atoms in fixed, simple ratios

• Compounds are formed by the combination of molecules

• Compounds are formed by the combination of subatomic particles

• Compounds are formed by the combination of isotopes

What concept did Dalton introduce to explain the conservation of mass in chemical reactions?

• Atoms are rearranged in reactions

• Atoms are created in reactions

• Atoms are destroyed in reactions

• Atoms change into energy in reactions

What discovery later disproved Dalton's idea that atoms are indivisible?

• Discovery of molecules

• Discovery of isotopes

• Discovery of subatomic particles

• Discovery of chemical reactions