Atomic History Worksheet

The Law of Conservation of Mass follows from the concept that

If two or more compounds are composed of the same two elements, the ratio of the masses of element that combine with a fixed mass of the other element is a simple whole number. This is a statement of the law of

the law of multiple proportions can be partly explained by the idea that

Who was the schoolmaster who studied chemistry and proposed an atomic theory

Who first recognized that the ratio of them number of atoms that combine is the same as the ratio of the masses that combine

The principle of atomic theory recognized today were conceived by

According to Dalton's atomic theory, atoms

Which of the following is NOT part of Dalton's atomic theory

According to Dalton's atomic theory, atoms

Dalton's atomic theory did NOT explain the law of

The law of definite proportions

Dalton's atomic theory help to explain the law of conservation of mass because it stated that atoms

Who proposed the law of multiple proportions

Dalton's atomic theory essentially agreed with the present atomic theory EXCEPT for the statement that

Which of the following statements is true

Which concept in Dalton's atomic theory has been modified

The atom's theory proposed by Dalton

In early experiments of electricity and matter, an electrical current was passed through a glass tube containing

When an electrical current passed through a glass tube, a paddle wheel placed between the electrode moved. Scientists concluded that

In glass tube , electrical current passed through for the negative electrode called the , to the other electrode

The Rays produced in a cathode tube in a early experiment were

The behavior of cathode Rays produced in a glass tube containing gas at low pressure led scientists to conclude that the Rays

After measuring the ratio of the charge of a cathode ray particle to its mass.Thomson concluded that the particles

Experiment with cathode Rays led to the discovery of the

Millikan's experiments

The discovery of cathode Rays in Thomson's experiments was evidence of the Nature of electron

Who discovered the nucleus by bombarding gold foil with positively charged particles and nothing that some particles were widely deflected

The discovery of the electron results from experiments using

In Rutherford's experiments, very few positively charged particles

In Rutherford's experiments, positively charged particles

In Rutherford's experiments,mostly of the particles

Because most particles fired at metal foil passed straight through, Rutherford concluded that

Because a few positively charged particles bounced back from the foil, Rutherford concluded that such particles were

Rutherford's experiment led to the discovery of the

Rutherford's experimental results led him to conclude that atoms could matin massive central regions that have

Rutherford fired positively charged particles at metal foil ad concluded that most of the mass of an atoms was

What did Rutherford conclude about the structure of the Atom

In Rutherford's experiments, the backwards deflection of alpha particles gave evidence of an atom's

A nuclear particle that has about the same mass as a proton, but with no electrical charge, is called a

The nucleus of an atom has all of the following characteristics EXCEPT that is