Atomic Theory and Atoms

What does "atomos" mean?

• easily divided
• unable to be divided
• really small
• sometimes divided

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NGSS.MS-PS1-1

Who was the first person to publish a theory about the existence of atoms?

• John Dalton
• JJ Thomson
• Earnest Rutherford
• Erwin Schrodinger

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NGSS.MS-PS1-1

Which of the following are parts of Dalton's theory?

• All substances are made of atoms.
• Atoms Join with other atoms to make new substances.
• Atoms of different elements are different
• All of these are part of his theory

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NGSS.MS-PS1-1

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Which scientist is credited with discovering the electron?

• John Dalton
• JJ Thomson
• Ernest Rutherford
• Werner Heisenberg

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NGSS.MS-PS1-1

What did Ernest Rutherford discover when he shot particles at gold foil?

• Electrons
• Protons
• Neutrons
• A tiny, dense, positively charged nucleus 

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What two particles are part of the nucleus of an atom?

• Protons and Electrons
• Electrons and Neutrons
• Protons and Neutrons
• Alpha and Beta

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NGSS.MS-PS1-1

What particle resides in the nucleus and has no charge?

• Proton
• Neutron
• Electron
• Crouton

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Who came up with the model in which electrons orbit the nucleus in specific levels?

• JJ Thomson
• Earnest Rutherford
• Niels Bohr
• Erwin Schrodinger

In the current atomic theory, where are electrons likely to be found?

• Specific Orbits, like planets around a star
• In the nucleus
• In the electron cloud
• electrons are not part of the current atomic theory

Tags

NGSS.MS-PS1-1

The number of protons in the nucleus of an atom is the ____________ ____________.

• Atomic Number
• Atomic Mass
• Mass Number
• 12

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