atoms. atomic theory, and atomic mass

"Everything is composed of atoms" was stated by:

• Democritis
• Dalton
• Moseley
• Einstein

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NGSS.MS-PS1-1

John Dalton stated:

• elements are made of atoms
• atoms of a given element are identical
• atoms cannot be subdivided, created, nor destroyed
• all of the above

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NGSS.HS-PS1-7

The scientist responsible for "discovering" the nucleus is:

• Bohr
• Rutherford
• Schroedinger
• Einstein

The nucleus of an atom can be described as:

• spacious and negatively charged
• dense and positively charged
• spacious and positively charged
• dense and negatively charged

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NGSS.MS-PS1-1

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RN

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NGSS.MS-PS1-1

Electrons can be found in

• The protons
• The nucleus
• Electron Clouds

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Thomson
• Ernest Rutherford
• John Dalton
• Democritus

Tags

NGSS.MS-PS1-1

The majority of an atom's mass exists where?

• In the nucleus
• In the electron cloud
• In the space between the nucleus and the electrons
• In the neutrons

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NGSS.HS-PS1-8

Neon has an atomic number of 10 and an atomic mass of 20.180.  How many protons, electrons, and neutrons will it have?

• P=10 E=10 N=11
• P=5  E=5  N=10
• P=10  E=10  N=10
• P=10  E=5  N=5

Isotopes are elements with a different amount of

• protons
• neutrons
• electrons
• atoms