AP Chemistry Atoms, Molecules, and Ions — practice questions
18 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP Chemistry Atoms, Molecules, and Ions in the app →Dalton's atomic theory was first published in:Aristotle held that matter was made from four elements: fire, earth, water and:Thomson's cathode ray particle is now known as the:Atoms of the same element that differ in mass are called:The unified atomic mass unit is defined as exactly one twelfth of the mass of one atom of:The law of definite proportions is also known as the law of:The law of multiple proportions says the masses of one element combining with a fixed mass of another form:Because atoms are neither created nor destroyed in a chemical change, the total mass present:Millikan's oil drop experiment measured the electron's:Rutherford concluded that most alpha particles passed through gold foil undeflected because they travelled thrThe discovery of the neutron explained isotopes because isotopes differ in:Where in an atom is most of the mass concentrated, and where is most of the volume?The diameter of an atom is about how many times larger than the diameter of its nucleus?A compound, in Dalton's terms, consists of atoms of two or more elements combined in:An element such as copper cannot be broken into simpler substances because it consists of:Thomson determined which quantity for the electron?The total mass of six protons, six neutrons and six electrons is 12.0993 amu, slightly more than a carbon-12 aCopper and chlorine form compounds at 0.558 g and 1.116 g of chlorine per gram of copper, a ratio of: