The Atom: From Philosophical Idea to Scientific Theory

The Atom: From Philosophical Idea to Scientific Theory

Multiple Choice

Which of the following statements of Dalton’s atomic theory describes conservation of mass?

• All matter is composed of atoms.

• Atoms of a given element are identical in size, mass, and other

• Atoms cannot be subdivided, created, or destroyed.

• Atoms of different chemical elements combine in simple whole number ratios to form chemical compounds.

Multiple Choice

The fact that every sample of a particular chemical compound contains the same elements in exactly the same proportions by mass is known as the law of...

• definite proportions

• multiple proportions

Multiple Choice

If two or more compounds are composed of the same two elements, then the ratio of the masses of the second element that is combined with a certain mass of the first element is always a ratio of small whole numbers. This statement is called the law of...

• definite proportions

• conservation of mass

• atomic theory

• multiple proportions

Multiple Choice

Which is one way that Dalton’s atomic theory has been shown to be incorrect?

• Atoms can change identity in chemical reactions.

• Atoms can be split into subatomic particles.

• Atoms can be destroyed by chemical reactions.

• Some atoms of a particular element are identical to atoms of other elements.