History of the Atomic Model

What type of growth is the human population experiencing today?

• Exponential growth

• Zero population growth

• Slight decreases in growth

• Slight increases in growth

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

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NGSS.HS-PS1-7

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

Whose experiment involved shooting small, positively charged alpha particles at a sheet of gold foil?

• J.J. Thompson
• Max Planck
• Ernest Rutherford
• Niels Bohr

Who concluded that atoms consisted largely of empty space with most of the mass concentrated in the center?

• J. J. Thomson
• Max Planck
• Ernest Rutherford
• Niels Bohr

Rutherford referred to the center of the atom, where the mass was concentrated, as _____

• the kernel
• the nucleus
• the focus
• the heart

Tags

NGSS.HS-PS1-8

Who stipulated that electrons orbit the nucleus at fixed energies and distances?

• Albert Einstein
• Max Planck
• Ernest Rutherford
• Niels Bohr

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NGSS.HS-PS1-1

As electrons circling an atom shift between energy levels, they absorb or release energy in the form of _____

• heat at a specific temperature
• kinetic energy at a certain speed
• light of a specific wavelength
• sound waves at a certain intensity

Tags

NGSS.HS-PS1-2

While making his model of an atom, what structure did Rutherford discover (containing protons and neutrons)?

• the Nucleus
• the Electron Cloud
• the quarks
• the atomic mass

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NGSS.HS-PS1-8