Chemistry Ch 3 Atoms

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

• John Dalton
• Jons Berzelius
• Robert Brown
• Dmitri Mendeleev

The principles of atomic theory recognized today were conceived by 

• Avogadro
• Bohr
• Dalton
• Rutherford

Tags

NGSS.HS-PS1-7

According to Dalton's atomic theory, atoms

• are destroyed in chemical reactions
• can be divided
• of each element are identical in size, mass, and other properties
• of different elements cannot combine

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NGSS.HS-PS1-7

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

• could not combine
• could not be created or destroyed 
• all have the same mass
• were invisible

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NGSS.HS-PS1-7

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

• water
• gas under high pressure 
• liquid oxygen
• gas under low pressure

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NGSS.HS-PS3-5

In a glass tube, electrical current pass from the negative electrode, called the ____, to the other electrode

• cathode
• anode
• electron
• millikan

Experiments with cathode rays led to the discovery of the 

• proton
• nucleus
• neutron
• electron

Which scientist measured the charge on the electron?

• Dalton
• Rutherford
• Millikan
• Marsden

A positively charge particle is a(n)

• proton
• neutron
• electron
• positron

The mass of a neutron is 

• about the same as that of a proton
• about the same as that of an electron
• double that of a proton
• double that of an electron