2400-Year Search for the Atom

Who first proposed that everything in the world was made up of tiny particles?

• Aristotle
• Democritus
• Plato
• Socrates

Democritus called the tiniest particles of matter "atomos", which is Greek for _____

• empty space
• invisible
• very small
• indivisible

Tags

NGSS.MS-PS1-1

Which philosopher stated that matter was made of four elements: earth, wind, water and fire?

• Aristotle
• Democritus
• Plato
• Socrates

In 1808, who was the Quaker teacher that challenged Aristotelian theory?

• Niels Bohr

• J. J. Thomson

• John Dalton

• Ernest Rutherford

Dalton showed that common substances always broke down into _____

• the same elements in the same proportions
• elements in equal quantities
• hydrogen and oxygen
• earth, wind, water and fire

Tags

NGSS.HS-PS1-7

Dalton proposed that atoms _____

• could be created and destroyed
• could be created but not destroyed
• could be destroyed but not created
• could neither be created nor destroyed

Tags

NGSS.HS-PS1-7

Dalton concluded that the various compounds were combinations of atoms of different _____

• facets
• materials
• elements
• ingredients

The electron was discovered in 1897.  Who discovered it?

• Ernest Rutherford
• John Dalton
• J. J. Thomson
• Niels Bohr

Whose model showed atoms as uniformly packed spheres of positive matter filled with negatively charged electrons?

• J. J. Thomson
• John Dalton
• Ernest Rutherford
• Niels Bohr

J. J. Thomson won a Nobel Prize in 1906.  Which particle did he discover?

• the electron
• the proton
• the neutron
• the photon