Dalton's laws

Democritus believed the atom was

• indivisible

• made up of smaller particles

• universally accepted

• experimentally verified

Dalton believed that atoms could be

• broken into parts

• rearranged to create other atoms

• combined to form compounds

• used to form elements

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By the 1700s scientists knew about

• neutrons

• elements

• electrons

• protons

Samples of a specific compound from different sources obey the law of

• multiple proportions

• simple proportions

• definite proportions

• ideal proportions

Our idea of the atom

• has not changed since Democritus

• has been fairly constant for 200 years

• is essentially what John Dalton described

• is very different from what Dalton described

Chemical reactions change the ______ of atoms

• composition

• arrangement

• size

• shape

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Methane (one C, 4 H) and ethane (2 C, 6H) illustrate the law of

• definite proportions

• multiple proportions

• additive proportions

• conservation of mass

The law of conservation of mass says that the mass of products in a reaction

• is greater than the mass of the reactants

• is less than the mass of the reactants

• is equal to the mass of the reactants

• none of the above

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Atoms combine in simple ___________ to form compounds.

• proportions

• fractional ratios

• simple whole number ratios

• variable ratios

A rearrangement of atoms could be called

• chemical reaction

• nuclear fission

• transmutation

• elemental partition

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