Atomic Structure: Ace the Chemistry Challenge

Which of the following statements accurately reflects the Law of Definite Proportions?

• AThe mass of reactants in a closed system remains constant over time.
• BDifferent samples of the same compound contain the same elements in the same mass proportions.
• CWhen two elements combine to form multiple compounds, the ratios of their masses are always whole numbers.
• DAtoms are neither created nor destroyed in a chemical reaction.

How did Dalton's Atomic Theory explain the Law of Conservation of Mass?

• ABy suggesting that atoms are infinitely divisible.
• BBy proposing that atoms of different elements have different properties.
• CBy stating that atoms are rearranged, not created or destroyed, during a chemical change.
• DBy asserting that all atoms of an element are identical.

What is the significance of the Law of Multiple Proportions in the context of Dalton's Atomic Theory?

• AIt provided evidence against the existence of atoms.
• BIt supported the idea that elements combine in simple, whole-number ratios to form compounds.
• CIt disproved the Law of Conservation of Mass.
• DIt demonstrated that atoms can be created and destroyed.

What key discovery was made through Thomson's Cathode Ray Tube experiment?

• AThe existence of the nucleus.
• BThe existence of neutrons.
• CThe existence of electrons and their negative charge.
• DThe existence of protons.

What critical information did Millikan's Oil Drop experiment provide about the electron?

• AThe ratio of mass to charge.
• BThe exact charge and mass of an electron.
• CThe positive charge distribution within the atom.
• DThe existence of isotopes.